Finding the Fourth Proportional to 399,654.72, 599,708.76 and 146,902.32

Step by Step Solution

1. Step 1: Write the proportion equation
   399,654.72 : 599,708.76 = 146,902.32 : x
2. Step 2: Convert to fraction form
   399,654.72/599,708.76 = 146,902.32/x
3. Step 3: Cross multiply
   399,654.72x = 599,708.76 × 146,902.32
4. Step 4: Simplify right side
   399,654.72x = 88,098,608,168.32
5. Step 5: Solve for x
   x = 88,098,608,168.32/399,654.72
6. Step 6: Final answer
   x = 220,436.80