Finding the Fourth Proportional to 21,425,123.84, 29,559,477.76 and 12,131,423.68

Step by Step Solution

1. Step 1: Write the proportion equation
   21,425,123.84 : 29,559,477.76 = 12,131,423.68 : x
2. Step 2: Convert to fraction form
   21,425,123.84/29,559,477.76 = 12,131,423.68/x
3. Step 3: Cross multiply
   21,425,123.84x = 29,559,477.76 × 12,131,423.68
4. Step 4: Simplify right side
   21,425,123.84x = 358,598,548,466,097.38
5. Step 5: Solve for x
   x = 358,598,548,466,097.38/21,425,123.84
6. Step 6: Final answer
   x = 16,737,291.75