Finding the Fourth Proportional to 647,300.64, 892,909.08 and 405,162.84

Step by Step Solution

1. Step 1: Write the proportion equation
   647,300.64 : 892,909.08 = 405,162.84 : x
2. Step 2: Convert to fraction form
   647,300.64/892,909.08 = 405,162.84/x
3. Step 3: Cross multiply
   647,300.64x = 892,909.08 × 405,162.84
4. Step 4: Simplify right side
   647,300.64x = 361,773,578,714.59
5. Step 5: Solve for x
   x = 361,773,578,714.59/647,300.64
6. Step 6: Final answer
   x = 558,895.75