Finding the Fourth Proportional to 7,148.16, 9,861.12 and 4,662.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,148.16 : 9,861.12 = 4,662.72 : x
2. Step 2: Convert to fraction form
   7,148.16/9,861.12 = 4,662.72/x
3. Step 3: Cross multiply
   7,148.16x = 9,861.12 × 4,662.72
4. Step 4: Simplify right side
   7,148.16x = 45,979,641.45
5. Step 5: Solve for x
   x = 45,979,641.45/7,148.16
6. Step 6: Final answer
   x = 6,432.37