Finding the Fourth Proportional to 123,562.50, 170,534.46 and 78,244.62

Step by Step Solution

1. Step 1: Write the proportion equation
   123,562.50 : 170,534.46 = 78,244.62 : x
2. Step 2: Convert to fraction form
   123,562.50/170,534.46 = 78,244.62/x
3. Step 3: Cross multiply
   123,562.50x = 170,534.46 × 78,244.62
4. Step 4: Simplify right side
   123,562.50x = 13,343,404,019.61
5. Step 5: Solve for x
   x = 13,343,404,019.61/123,562.50
6. Step 6: Final answer
   x = 107,989.11