Finding the Fourth Proportional to 172,300.41, 258,450.71 and 65,659.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,300.41 : 258,450.71 = 65,659.50 : x
2. Step 2: Convert to fraction form
   172,300.41/258,450.71 = 65,659.50/x
3. Step 3: Cross multiply
   172,300.41x = 258,450.71 × 65,659.50
4. Step 4: Simplify right side
   172,300.41x = 16,969,744,064.95
5. Step 5: Solve for x
   x = 16,969,744,064.95/172,300.41
6. Step 6: Final answer
   x = 98,489.28