Finding the Fourth Proportional to 31,042.46, 42,888.78 and 21,652.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,042.46 : 42,888.78 = 21,652.94 : x
2. Step 2: Convert to fraction form
   31,042.46/42,888.78 = 21,652.94/x
3. Step 3: Cross multiply
   31,042.46x = 42,888.78 × 21,652.94
4. Step 4: Simplify right side
   31,042.46x = 928,668,180.01
5. Step 5: Solve for x
   x = 928,668,180.01/31,042.46
6. Step 6: Final answer
   x = 29,916.06