Finding the Fourth Proportional to 621,100.38, 931,598.58 and 171,826.86

Step by Step Solution

1. Step 1: Write the proportion equation
   621,100.38 : 931,598.58 = 171,826.86 : x
2. Step 2: Convert to fraction form
   621,100.38/931,598.58 = 171,826.86/x
3. Step 3: Cross multiply
   621,100.38x = 931,598.58 × 171,826.86
4. Step 4: Simplify right side
   621,100.38x = 160,073,658,781.86
5. Step 5: Solve for x
   x = 160,073,658,781.86/621,100.38
6. Step 6: Final answer
   x = 257,725.91