Finding the Fourth Proportional to 22,632.20, 31,236.18 and 13,200.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,632.20 : 31,236.18 = 13,200.76 : x
2. Step 2: Convert to fraction form
   22,632.20/31,236.18 = 13,200.76/x
3. Step 3: Cross multiply
   22,632.20x = 31,236.18 × 13,200.76
4. Step 4: Simplify right side
   22,632.20x = 412,341,159.32
5. Step 5: Solve for x
   x = 412,341,159.32/22,632.20
6. Step 6: Final answer
   x = 18,219.23