Finding the Fourth Proportional to 402,371.78, 603,557.89 and 149,619.43

Step by Step Solution

1. Step 1: Write the proportion equation
   402,371.78 : 603,557.89 = 149,619.43 : x
2. Step 2: Convert to fraction form
   402,371.78/603,557.89 = 149,619.43/x
3. Step 3: Cross multiply
   402,371.78x = 603,557.89 × 149,619.43
4. Step 4: Simplify right side
   402,371.78x = 90,303,984,456.01
5. Step 5: Solve for x
   x = 90,303,984,456.01/402,371.78
6. Step 6: Final answer
   x = 224,429.22