Finding the Fourth Proportional to 22,245.72, 30,689.33 and 13,288.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,245.72 : 30,689.33 = 13,288.74 : x
2. Step 2: Convert to fraction form
   22,245.72/30,689.33 = 13,288.74/x
3. Step 3: Cross multiply
   22,245.72x = 30,689.33 × 13,288.74
4. Step 4: Simplify right side
   22,245.72x = 407,822,460.70
5. Step 5: Solve for x
   x = 407,822,460.70/22,245.72
6. Step 6: Final answer
   x = 18,332.63