Finding the Fourth Proportional to 1,022.71, 1,410.25 and 939.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,022.71 : 1,410.25 = 939.48 : x
2. Step 2: Convert to fraction form
   1,022.71/1,410.25 = 939.48/x
3. Step 3: Cross multiply
   1,022.71x = 1,410.25 × 939.48
4. Step 4: Simplify right side
   1,022.71x = 1,324,901.67
5. Step 5: Solve for x
   x = 1,324,901.67/1,022.71
6. Step 6: Final answer
   x = 1,295.48