Finding the Fourth Proportional to 1,870.79, 2,581.58 and 1,031.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.79 : 2,581.58 = 1,031.53 : x
2. Step 2: Convert to fraction form
   1,870.79/2,581.58 = 1,031.53/x
3. Step 3: Cross multiply
   1,870.79x = 2,581.58 × 1,031.53
4. Step 4: Simplify right side
   1,870.79x = 2,662,974.31
5. Step 5: Solve for x
   x = 2,662,974.31/1,870.79
6. Step 6: Final answer
   x = 1,423.45