Finding the Fourth Proportional to 1,870.80, 2,581.59 and 1,031.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.80 : 2,581.59 = 1,031.51 : x
2. Step 2: Convert to fraction form
   1,870.80/2,581.59 = 1,031.51/x
3. Step 3: Cross multiply
   1,870.80x = 2,581.59 × 1,031.51
4. Step 4: Simplify right side
   1,870.80x = 2,662,943.32
5. Step 5: Solve for x
   x = 2,662,943.32/1,870.80
6. Step 6: Final answer
   x = 1,423.42