Finding the Fourth Proportional to 621,250.82, 931,772.42 and 172,017.10

Step by Step Solution

1. Step 1: Write the proportion equation
   621,250.82 : 931,772.42 = 172,017.10 : x
2. Step 2: Convert to fraction form
   621,250.82/931,772.42 = 172,017.10/x
3. Step 3: Cross multiply
   621,250.82x = 931,772.42 × 172,017.10
4. Step 4: Simplify right side
   621,250.82x = 160,280,790,498.08
5. Step 5: Solve for x
   x = 160,280,790,498.08/621,250.82
6. Step 6: Final answer
   x = 257,996.91