Finding the Fourth Proportional to 74,437.57, 102,423.72 and 72,666.10

Step by Step Solution

1. Step 1: Write the proportion equation
   74,437.57 : 102,423.72 = 72,666.10 : x
2. Step 2: Convert to fraction form
   74,437.57/102,423.72 = 72,666.10/x
3. Step 3: Cross multiply
   74,437.57x = 102,423.72 × 72,666.10
4. Step 4: Simplify right side
   74,437.57x = 7,442,732,279.89
5. Step 5: Solve for x
   x = 7,442,732,279.89/74,437.57
6. Step 6: Final answer
   x = 99,986.23