Finding the Fourth Proportional to 172,440.56, 258,315.24 and 78,817.52

Step by Step Solution

1. Step 1: Write the proportion equation
   172,440.56 : 258,315.24 = 78,817.52 : x
2. Step 2: Convert to fraction form
   172,440.56/258,315.24 = 78,817.52/x
3. Step 3: Cross multiply
   172,440.56x = 258,315.24 × 78,817.52
4. Step 4: Simplify right side
   172,440.56x = 20,359,766,595.00
5. Step 5: Solve for x
   x = 20,359,766,595.00/172,440.56
6. Step 6: Final answer
   x = 118,068.32