Finding the Fourth Proportional to 647,298.62, 892,906.32 and 405,160.82

Step by Step Solution

1. Step 1: Write the proportion equation
   647,298.62 : 892,906.32 = 405,160.82 : x
2. Step 2: Convert to fraction form
   647,298.62/892,906.32 = 405,160.82/x
3. Step 3: Cross multiply
   647,298.62x = 892,906.32 × 405,160.82
4. Step 4: Simplify right side
   647,298.62x = 361,770,656,794.38
5. Step 5: Solve for x
   x = 361,770,656,794.38/647,298.62
6. Step 6: Final answer
   x = 558,892.98