Finding the Fourth Proportional to 1,581.57, 2,369.52 and 931.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.57 : 2,369.52 = 931.95 : x
2. Step 2: Convert to fraction form
   1,581.57/2,369.52 = 931.95/x
3. Step 3: Cross multiply
   1,581.57x = 2,369.52 × 931.95
4. Step 4: Simplify right side
   1,581.57x = 2,208,274.16
5. Step 5: Solve for x
   x = 2,208,274.16/1,581.57
6. Step 6: Final answer
   x = 1,396.25