Finding the Fourth Proportional to 6,399.20, 8,830.66 and 3,604.16

Step by Step Solution

1. Step 1: Write the proportion equation
   6,399.20 : 8,830.66 = 3,604.16 : x
2. Step 2: Convert to fraction form
   6,399.20/8,830.66 = 3,604.16/x
3. Step 3: Cross multiply
   6,399.20x = 8,830.66 × 3,604.16
4. Step 4: Simplify right side
   6,399.20x = 31,827,111.55
5. Step 5: Solve for x
   x = 31,827,111.55/6,399.20
6. Step 6: Final answer
   x = 4,973.61