Finding the Fourth Proportional to 658,061.96, 908,186.78 and 399,879.32

Step by Step Solution

1. Step 1: Write the proportion equation
   658,061.96 : 908,186.78 = 399,879.32 : x
2. Step 2: Convert to fraction form
   658,061.96/908,186.78 = 399,879.32/x
3. Step 3: Cross multiply
   658,061.96x = 908,186.78 × 399,879.32
4. Step 4: Simplify right side
   658,061.96x = 363,165,108,478.15
5. Step 5: Solve for x
   x = 363,165,108,478.15/658,061.96
6. Step 6: Final answer
   x = 551,870.70