Finding the Fourth Proportional to 867,534.72, 1,196,925.12 and 485,500.80

Step by Step Solution

1. Step 1: Write the proportion equation
   867,534.72 : 1,196,925.12 = 485,500.80 : x
2. Step 2: Convert to fraction form
   867,534.72/1,196,925.12 = 485,500.80/x
3. Step 3: Cross multiply
   867,534.72x = 1,196,925.12 × 485,500.80
4. Step 4: Simplify right side
   867,534.72x = 581,108,103,300.10
5. Step 5: Solve for x
   x = 581,108,103,300.10/867,534.72
6. Step 6: Final answer
   x = 669,838.44