Finding the Fourth Proportional to 74,131.62, 102,301.72 and 42,310.78

Step by Step Solution

1. Step 1: Write the proportion equation
   74,131.62 : 102,301.72 = 42,310.78 : x
2. Step 2: Convert to fraction form
   74,131.62/102,301.72 = 42,310.78/x
3. Step 3: Cross multiply
   74,131.62x = 102,301.72 × 42,310.78
4. Step 4: Simplify right side
   74,131.62x = 4,328,465,568.54
5. Step 5: Solve for x
   x = 4,328,465,568.54/74,131.62
6. Step 6: Final answer
   x = 58,388.92