Finding the Fourth Proportional to 22,561.39, 31,135.79 and 13,002.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,561.39 : 31,135.79 = 13,002.72 : x
2. Step 2: Convert to fraction form
   22,561.39/31,135.79 = 13,002.72/x
3. Step 3: Cross multiply
   22,561.39x = 31,135.79 × 13,002.72
4. Step 4: Simplify right side
   22,561.39x = 404,849,959.35
5. Step 5: Solve for x
   x = 404,849,959.35/22,561.39
6. Step 6: Final answer
   x = 17,944.37