Finding the Fourth Proportional to 123,499.32, 170,432.28 and 75,725.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123,499.32 : 170,432.28 = 75,725.16 : x
2. Step 2: Convert to fraction form
   123,499.32/170,432.28 = 75,725.16/x
3. Step 3: Cross multiply
   123,499.32x = 170,432.28 × 75,725.16
4. Step 4: Simplify right side
   123,499.32x = 12,906,011,672.16
5. Step 5: Solve for x
   x = 12,906,011,672.16/123,499.32
6. Step 6: Final answer
   x = 104,502.69