Finding the Fourth Proportional to 8,870.22, 13,271.92 and 5,299.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.22 : 13,271.92 = 5,299.12 : x
2. Step 2: Convert to fraction form
   8,870.22/13,271.92 = 5,299.12/x
3. Step 3: Cross multiply
   8,870.22x = 13,271.92 × 5,299.12
4. Step 4: Simplify right side
   8,870.22x = 70,329,496.71
5. Step 5: Solve for x
   x = 70,329,496.71/8,870.22
6. Step 6: Final answer
   x = 7,928.72