Finding the Fourth Proportional to 31,068.64, 42,844.92 and 20,882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.64 : 42,844.92 = 20,882.72 : x
2. Step 2: Convert to fraction form
   31,068.64/42,844.92 = 20,882.72/x
3. Step 3: Cross multiply
   31,068.64x = 42,844.92 × 20,882.72
4. Step 4: Simplify right side
   31,068.64x = 894,718,467.78
5. Step 5: Solve for x
   x = 894,718,467.78/31,068.64
6. Step 6: Final answer
   x = 28,798.12