Finding the Fourth Proportional to 1,870.28, 2,580.98 and 1,031.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.28 : 2,580.98 = 1,031.08 : x
2. Step 2: Convert to fraction form
   1,870.28/2,580.98 = 1,031.08/x
3. Step 3: Cross multiply
   1,870.28x = 2,580.98 × 1,031.08
4. Step 4: Simplify right side
   1,870.28x = 2,661,185.25
5. Step 5: Solve for x
   x = 2,661,185.25/1,870.28
6. Step 6: Final answer
   x = 1,422.88