Finding the Fourth Proportional to 1,371.88, 1,892.60 and 958.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.88 : 1,892.60 = 958.12 : x
2. Step 2: Convert to fraction form
   1,371.88/1,892.60 = 958.12/x
3. Step 3: Cross multiply
   1,371.88x = 1,892.60 × 958.12
4. Step 4: Simplify right side
   1,371.88x = 1,813,337.91
5. Step 5: Solve for x
   x = 1,813,337.91/1,371.88
6. Step 6: Final answer
   x = 1,321.79