Finding the Fourth Proportional to 31,068.72, 42,844.88 and 20,882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.72 : 42,844.88 = 20,882.72 : x
2. Step 2: Convert to fraction form
   31,068.72/42,844.88 = 20,882.72/x
3. Step 3: Cross multiply
   31,068.72x = 42,844.88 × 20,882.72
4. Step 4: Simplify right side
   31,068.72x = 894,717,632.47
5. Step 5: Solve for x
   x = 894,717,632.47/31,068.72
6. Step 6: Final answer
   x = 28,798.02