Finding the Fourth Proportional to 410,123.31, 616,059.29 and 386,153.55

Step by Step Solution

1. Step 1: Write the proportion equation
   410,123.31 : 616,059.29 = 386,153.55 : x
2. Step 2: Convert to fraction form
   410,123.31/616,059.29 = 386,153.55/x
3. Step 3: Cross multiply
   410,123.31x = 616,059.29 × 386,153.55
4. Step 4: Simplify right side
   410,123.31x = 237,893,479,913.21
5. Step 5: Solve for x
   x = 237,893,479,913.21/410,123.31
6. Step 6: Final answer
   x = 580,053.55