Finding the Fourth Proportional to 1,870.96, 2,581.78 and 1,031.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.96 : 2,581.78 = 1,031.60 : x
2. Step 2: Convert to fraction form
   1,870.96/2,581.78 = 1,031.60/x
3. Step 3: Cross multiply
   1,870.96x = 2,581.78 × 1,031.60
4. Step 4: Simplify right side
   1,870.96x = 2,663,364.25
5. Step 5: Solve for x
   x = 2,663,364.25/1,870.96
6. Step 6: Final answer
   x = 1,423.53