Finding the Fourth Proportional to 7,200.32, 9,935.88 and 4,215.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.32 : 9,935.88 = 4,215.76 : x
2. Step 2: Convert to fraction form
   7,200.32/9,935.88 = 4,215.76/x
3. Step 3: Cross multiply
   7,200.32x = 9,935.88 × 4,215.76
4. Step 4: Simplify right side
   7,200.32x = 41,887,285.47
5. Step 5: Solve for x
   x = 41,887,285.47/7,200.32
6. Step 6: Final answer
   x = 5,817.42