Finding the Fourth Proportional to 22,250.24, 30,702.72 and 12,819.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,250.24 : 30,702.72 = 12,819.20 : x
2. Step 2: Convert to fraction form
   22,250.24/30,702.72 = 12,819.20/x
3. Step 3: Cross multiply
   22,250.24x = 30,702.72 × 12,819.20
4. Step 4: Simplify right side
   22,250.24x = 393,584,308.22
5. Step 5: Solve for x
   x = 393,584,308.22/22,250.24
6. Step 6: Final answer
   x = 17,688.99