Finding the Fourth Proportional to 22,200.72, 30,643.56 and 12,775.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,200.72 : 30,643.56 = 12,775.92 : x
2. Step 2: Convert to fraction form
   22,200.72/30,643.56 = 12,775.92/x
3. Step 3: Cross multiply
   22,200.72x = 30,643.56 × 12,775.92
4. Step 4: Simplify right side
   22,200.72x = 391,499,671.08
5. Step 5: Solve for x
   x = 391,499,671.08/22,200.72
6. Step 6: Final answer
   x = 17,634.55