Finding the Fourth Proportional to 21,514,786.28, 29,691,457.71 and 12,098,540.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,514,786.28 : 29,691,457.71 = 12,098,540.80 : x
2. Step 2: Convert to fraction form
   21,514,786.28/29,691,457.71 = 12,098,540.80/x
3. Step 3: Cross multiply
   21,514,786.28x = 29,691,457.71 × 12,098,540.80
4. Step 4: Simplify right side
   21,514,786.28x = 359,223,312,507,654.38
5. Step 5: Solve for x
   x = 359,223,312,507,654.38/21,514,786.28
6. Step 6: Final answer
   x = 16,696,578.24