Finding the Fourth Proportional to 172,116.05, 258,084.92 and 77,264.52

Step by Step Solution

1. Step 1: Write the proportion equation
   172,116.05 : 258,084.92 = 77,264.52 : x
2. Step 2: Convert to fraction form
   172,116.05/258,084.92 = 77,264.52/x
3. Step 3: Cross multiply
   172,116.05x = 258,084.92 × 77,264.52
4. Step 4: Simplify right side
   172,116.05x = 19,940,807,076.72
5. Step 5: Solve for x
   x = 19,940,807,076.72/172,116.05
6. Step 6: Final answer
   x = 115,856.76