Finding the Fourth Proportional to 171,498.71, 257,248.17 and 71,604.47

Step by Step Solution

1. Step 1: Write the proportion equation
   171,498.71 : 257,248.17 = 71,604.47 : x
2. Step 2: Convert to fraction form
   171,498.71/257,248.17 = 71,604.47/x
3. Step 3: Cross multiply
   171,498.71x = 257,248.17 × 71,604.47
4. Step 4: Simplify right side
   171,498.71x = 18,420,118,871.32
5. Step 5: Solve for x
   x = 18,420,118,871.32/171,498.71
6. Step 6: Final answer
   x = 107,406.75