Finding the Fourth Proportional to 42,010.28, 57,978.27 and 31,381.46

Step by Step Solution

1. Step 1: Write the proportion equation
   42,010.28 : 57,978.27 = 31,381.46 : x
2. Step 2: Convert to fraction form
   42,010.28/57,978.27 = 31,381.46/x
3. Step 3: Cross multiply
   42,010.28x = 57,978.27 × 31,381.46
4. Step 4: Simplify right side
   42,010.28x = 1,819,442,314.08
5. Step 5: Solve for x
   x = 1,819,442,314.08/42,010.28
6. Step 6: Final answer
   x = 43,309.46