Finding the Fourth Proportional to 625,123.74, 862,667.31 and 338,649.42

Step by Step Solution

1. Step 1: Write the proportion equation
   625,123.74 : 862,667.31 = 338,649.42 : x
2. Step 2: Convert to fraction form
   625,123.74/862,667.31 = 338,649.42/x
3. Step 3: Cross multiply
   625,123.74x = 862,667.31 × 338,649.42
4. Step 4: Simplify right side
   625,123.74x = 292,141,784,184.46
5. Step 5: Solve for x
   x = 292,141,784,184.46/625,123.74
6. Step 6: Final answer
   x = 467,334.33