Finding the Fourth Proportional to 6,407.76, 8,842.56 and 3,613.32

Step by Step Solution

1. Step 1: Write the proportion equation
   6,407.76 : 8,842.56 = 3,613.32 : x
2. Step 2: Convert to fraction form
   6,407.76/8,842.56 = 3,613.32/x
3. Step 3: Cross multiply
   6,407.76x = 8,842.56 × 3,613.32
4. Step 4: Simplify right side
   6,407.76x = 31,950,998.90
5. Step 5: Solve for x
   x = 31,950,998.90/6,407.76
6. Step 6: Final answer
   x = 4,986.30