Finding the Fourth Proportional to 21,142,216,992.53, 29,177,026,569.85 and 12,111,720,414.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142,216,992.53 : 29,177,026,569.85 = 12,111,720,414.89 : x
2. Step 2: Convert to fraction form
   21,142,216,992.53/29,177,026,569.85 = 12,111,720,414.89/x
3. Step 3: Cross multiply
   21,142,216,992.53x = 29,177,026,569.85 × 12,111,720,414.89
4. Step 4: Simplify right side
   21,142,216,992.53x = 353,383,988,351,657,967,616
5. Step 5: Solve for x
   x = 353,383,988,351,657,967,616/21,142,216,992.53
6. Step 6: Final answer
   x = 16,714,613,631.89