Finding the Fourth Proportional to 172,320.54, 258,522.12 and 83,470.20

Step by Step Solution

1. Step 1: Write the proportion equation
   172,320.54 : 258,522.12 = 83,470.20 : x
2. Step 2: Convert to fraction form
   172,320.54/258,522.12 = 83,470.20/x
3. Step 3: Cross multiply
   172,320.54x = 258,522.12 × 83,470.20
4. Step 4: Simplify right side
   172,320.54x = 21,578,893,060.82
5. Step 5: Solve for x
   x = 21,578,893,060.82/172,320.54
6. Step 6: Final answer
   x = 125,225.31