Finding the Fourth Proportional to 2,931.02, 4,391.67 and 1,285.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.02 : 4,391.67 = 1,285.10 : x
2. Step 2: Convert to fraction form
   2,931.02/4,391.67 = 1,285.10/x
3. Step 3: Cross multiply
   2,931.02x = 4,391.67 × 1,285.10
4. Step 4: Simplify right side
   2,931.02x = 5,643,735.12
5. Step 5: Solve for x
   x = 5,643,735.12/2,931.02
6. Step 6: Final answer
   x = 1,925.52