Finding the Fourth Proportional to 1,870.42, 2,581.17 and 1,031.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.42 : 2,581.17 = 1,031.16 : x
2. Step 2: Convert to fraction form
   1,870.42/2,581.17 = 1,031.16/x
3. Step 3: Cross multiply
   1,870.42x = 2,581.17 × 1,031.16
4. Step 4: Simplify right side
   1,870.42x = 2,661,594.18
5. Step 5: Solve for x
   x = 2,661,594.18/1,870.42
6. Step 6: Final answer
   x = 1,422.99