Finding the Fourth Proportional to 6,631.92, 9,941.40 and 4,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,631.92 : 9,941.40 = 4,158.72 : x
2. Step 2: Convert to fraction form
   6,631.92/9,941.40 = 4,158.72/x
3. Step 3: Cross multiply
   6,631.92x = 9,941.40 × 4,158.72
4. Step 4: Simplify right side
   6,631.92x = 41,343,499.01
5. Step 5: Solve for x
   x = 41,343,499.01/6,631.92
6. Step 6: Final answer
   x = 6,234.02