Finding the Fourth Proportional to 9,871.29, 13,622.40 and 5,622.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.29 : 13,622.40 = 5,622.17 : x
2. Step 2: Convert to fraction form
   9,871.29/13,622.40 = 5,622.17/x
3. Step 3: Cross multiply
   9,871.29x = 13,622.40 × 5,622.17
4. Step 4: Simplify right side
   9,871.29x = 76,587,380.50
5. Step 5: Solve for x
   x = 76,587,380.50/9,871.29
6. Step 6: Final answer
   x = 7,758.60