Finding the Fourth Proportional to 6,401.60, 8,834.20 and 3,607.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,401.60 : 8,834.20 = 3,607.12 : x
2. Step 2: Convert to fraction form
   6,401.60/8,834.20 = 3,607.12/x
3. Step 3: Cross multiply
   6,401.60x = 8,834.20 × 3,607.12
4. Step 4: Simplify right side
   6,401.60x = 31,866,019.50
5. Step 5: Solve for x
   x = 31,866,019.50/6,401.60
6. Step 6: Final answer
   x = 4,977.82