Finding the Fourth Proportional to 8,617.64, 12,929.72 and 5,870.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,617.64 : 12,929.72 = 5,870.22 : x
2. Step 2: Convert to fraction form
   8,617.64/12,929.72 = 5,870.22/x
3. Step 3: Cross multiply
   8,617.64x = 12,929.72 × 5,870.22
4. Step 4: Simplify right side
   8,617.64x = 75,900,271.59
5. Step 5: Solve for x
   x = 75,900,271.59/8,617.64
6. Step 6: Final answer
   x = 8,807.55