Finding the Fourth Proportional to 21,026,141.91, 29,010,592.53 and 12,319,636.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,026,141.91 : 29,010,592.53 = 12,319,636.59 : x
2. Step 2: Convert to fraction form
   21,026,141.91/29,010,592.53 = 12,319,636.59/x
3. Step 3: Cross multiply
   21,026,141.91x = 29,010,592.53 × 12,319,636.59
4. Step 4: Simplify right side
   21,026,141.91x = 357,399,957,230,168.69
5. Step 5: Solve for x
   x = 357,399,957,230,168.69/21,026,141.91
6. Step 6: Final answer
   x = 16,997,885.72