Finding the Fourth Proportional to 123,818.52, 170,942.49 and 75,438.71

Step by Step Solution

1. Step 1: Write the proportion equation
   123,818.52 : 170,942.49 = 75,438.71 : x
2. Step 2: Convert to fraction form
   123,818.52/170,942.49 = 75,438.71/x
3. Step 3: Cross multiply
   123,818.52x = 170,942.49 × 75,438.71
4. Step 4: Simplify right side
   123,818.52x = 12,895,679,697.88
5. Step 5: Solve for x
   x = 12,895,679,697.88/123,818.52
6. Step 6: Final answer
   x = 104,149.85