Finding the Fourth Proportional to 21,244,515,596.72, 29,320,002,334.54 and 12,091,269,915.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,244,515,596.72 : 29,320,002,334.54 = 12,091,269,915.39 : x
2. Step 2: Convert to fraction form
   21,244,515,596.72/29,320,002,334.54 = 12,091,269,915.39/x
3. Step 3: Cross multiply
   21,244,515,596.72x = 29,320,002,334.54 × 12,091,269,915.39
4. Step 4: Simplify right side
   21,244,515,596.72x = 354,516,062,146,751,758,336
5. Step 5: Solve for x
   x = 354,516,062,146,751,758,336/21,244,515,596.72
6. Step 6: Final answer
   x = 16,687,415,654.77