Finding the Fourth Proportional to 3,523.92, 5,280.48 and 3,156.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,523.92 : 5,280.48 = 3,156.72 : x
2. Step 2: Convert to fraction form
   3,523.92/5,280.48 = 3,156.72/x
3. Step 3: Cross multiply
   3,523.92x = 5,280.48 × 3,156.72
4. Step 4: Simplify right side
   3,523.92x = 16,668,996.83
5. Step 5: Solve for x
   x = 16,668,996.83/3,523.92
6. Step 6: Final answer
   x = 4,730.24