Finding the Fourth Proportional to 948.71, 1,417.50 and 931.37

Step by Step Solution

1. Step 1: Write the proportion equation
   948.71 : 1,417.50 = 931.37 : x
2. Step 2: Convert to fraction form
   948.71/1,417.50 = 931.37/x
3. Step 3: Cross multiply
   948.71x = 1,417.50 × 931.37
4. Step 4: Simplify right side
   948.71x = 1,320,209.89
5. Step 5: Solve for x
   x = 1,320,209.89/948.71
6. Step 6: Final answer
   x = 1,391.58