Finding the Fourth Proportional to 399,128.75, 598,772.00 and 146,411.59

Step by Step Solution

1. Step 1: Write the proportion equation
   399,128.75 : 598,772.00 = 146,411.59 : x
2. Step 2: Convert to fraction form
   399,128.75/598,772.00 = 146,411.59/x
3. Step 3: Cross multiply
   399,128.75x = 598,772.00 × 146,411.59
4. Step 4: Simplify right side
   399,128.75x = 87,667,156,841.56
5. Step 5: Solve for x
   x = 87,667,156,841.56/399,128.75
6. Step 6: Final answer
   x = 219,646.31