Finding the Fourth Proportional to 123,789.29, 170,172.34 and 106,498.53

Step by Step Solution

1. Step 1: Write the proportion equation
   123,789.29 : 170,172.34 = 106,498.53 : x
2. Step 2: Convert to fraction form
   123,789.29/170,172.34 = 106,498.53/x
3. Step 3: Cross multiply
   123,789.29x = 170,172.34 × 106,498.53
4. Step 4: Simplify right side
   123,789.29x = 18,123,103,790.41
5. Step 5: Solve for x
   x = 18,123,103,790.41/123,789.29
6. Step 6: Final answer
   x = 146,402.85