Finding the Fourth Proportional to 22,303.52, 30,775.36 and 12,870.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,303.52 : 30,775.36 = 12,870.28 : x
2. Step 2: Convert to fraction form
   22,303.52/30,775.36 = 12,870.28/x
3. Step 3: Cross multiply
   22,303.52x = 30,775.36 × 12,870.28
4. Step 4: Simplify right side
   22,303.52x = 396,087,500.30
5. Step 5: Solve for x
   x = 396,087,500.30/22,303.52
6. Step 6: Final answer
   x = 17,758.97