Finding the Fourth Proportional to 172,140.08, 258,151.56 and 65,498.72

Step by Step Solution

1. Step 1: Write the proportion equation
   172,140.08 : 258,151.56 = 65,498.72 : x
2. Step 2: Convert to fraction form
   172,140.08/258,151.56 = 65,498.72/x
3. Step 3: Cross multiply
   172,140.08x = 258,151.56 × 65,498.72
4. Step 4: Simplify right side
   172,140.08x = 16,908,596,746.00
5. Step 5: Solve for x
   x = 16,908,596,746.00/172,140.08
6. Step 6: Final answer
   x = 98,225.80