Finding the Fourth Proportional to 461,580.89, 636,955.72 and 257,644.96

Step by Step Solution

1. Step 1: Write the proportion equation
   461,580.89 : 636,955.72 = 257,644.96 : x
2. Step 2: Convert to fraction form
   461,580.89/636,955.72 = 257,644.96/x
3. Step 3: Cross multiply
   461,580.89x = 636,955.72 × 257,644.96
4. Step 4: Simplify right side
   461,580.89x = 164,108,428,764.67
5. Step 5: Solve for x
   x = 164,108,428,764.67/461,580.89
6. Step 6: Final answer
   x = 355,535.58