Finding the Fourth Proportional to 123,502.55, 170,436.62 and 75,782.21

Step by Step Solution

1. Step 1: Write the proportion equation
   123,502.55 : 170,436.62 = 75,782.21 : x
2. Step 2: Convert to fraction form
   123,502.55/170,436.62 = 75,782.21/x
3. Step 3: Cross multiply
   123,502.55x = 170,436.62 × 75,782.21
4. Step 4: Simplify right side
   123,502.55x = 12,916,063,065.80
5. Step 5: Solve for x
   x = 12,916,063,065.80/123,502.55
6. Step 6: Final answer
   x = 104,581.35