Finding the Fourth Proportional to 4,890.32, 7,292.56 and 4,359.20

Step by Step Solution

1. Step 1: Write the proportion equation
   4,890.32 : 7,292.56 = 4,359.20 : x
2. Step 2: Convert to fraction form
   4,890.32/7,292.56 = 4,359.20/x
3. Step 3: Cross multiply
   4,890.32x = 7,292.56 × 4,359.20
4. Step 4: Simplify right side
   4,890.32x = 31,789,727.55
5. Step 5: Solve for x
   x = 31,789,727.55/4,890.32
6. Step 6: Final answer
   x = 6,500.54