Finding the Fourth Proportional to 171,398.95, 257,155.71 and 82,641.97

Step by Step Solution

1. Step 1: Write the proportion equation
   171,398.95 : 257,155.71 = 82,641.97 : x
2. Step 2: Convert to fraction form
   171,398.95/257,155.71 = 82,641.97/x
3. Step 3: Cross multiply
   171,398.95x = 257,155.71 × 82,641.97
4. Step 4: Simplify right side
   171,398.95x = 21,251,854,471.15
5. Step 5: Solve for x
   x = 21,251,854,471.15/171,398.95
6. Step 6: Final answer
   x = 123,990.58