Finding the Fourth Proportional to 74,436.57, 102,422.34 and 72,665.10

Step by Step Solution

1. Step 1: Write the proportion equation
   74,436.57 : 102,422.34 = 72,665.10 : x
2. Step 2: Convert to fraction form
   74,436.57/102,422.34 = 72,665.10/x
3. Step 3: Cross multiply
   74,436.57x = 102,422.34 × 72,665.10
4. Step 4: Simplify right side
   74,436.57x = 7,442,529,578.33
5. Step 5: Solve for x
   x = 7,442,529,578.33/74,436.57
6. Step 6: Final answer
   x = 99,984.85