Finding the Fourth Proportional to 647,835.72, 894,053.34 and 357,445.86

Step by Step Solution

1. Step 1: Write the proportion equation
   647,835.72 : 894,053.34 = 357,445.86 : x
2. Step 2: Convert to fraction form
   647,835.72/894,053.34 = 357,445.86/x
3. Step 3: Cross multiply
   647,835.72x = 894,053.34 × 357,445.86
4. Step 4: Simplify right side
   647,835.72x = 319,575,665,002.17
5. Step 5: Solve for x
   x = 319,575,665,002.17/647,835.72
6. Step 6: Final answer
   x = 493,297.38