Finding the Fourth Proportional to 647,068.12, 892,960.50 and 356,690

Step by Step Solution

1. Step 1: Write the proportion equation
   647,068.12 : 892,960.50 = 356,690 : x
2. Step 2: Convert to fraction form
   647,068.12/892,960.50 = 356,690/x
3. Step 3: Cross multiply
   647,068.12x = 892,960.50 × 356,690
4. Step 4: Simplify right side
   647,068.12x = 318,510,080,745
5. Step 5: Solve for x
   x = 318,510,080,745/647,068.12
6. Step 6: Final answer
   x = 492,235.78