Finding the Fourth Proportional to 621,499.15, 932,295.71 and 172,214.83

Step by Step Solution

1. Step 1: Write the proportion equation
   621,499.15 : 932,295.71 = 172,214.83 : x
2. Step 2: Convert to fraction form
   621,499.15/932,295.71 = 172,214.83/x
3. Step 3: Cross multiply
   621,499.15x = 932,295.71 × 172,214.83
4. Step 4: Simplify right side
   621,499.15x = 160,555,147,207.38
5. Step 5: Solve for x
   x = 160,555,147,207.38/621,499.15
6. Step 6: Final answer
   x = 258,335.26