Finding the Fourth Proportional to 1,870.60, 2,581.42 and 1,085.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.60 : 2,581.42 = 1,085.10 : x
2. Step 2: Convert to fraction form
   1,870.60/2,581.42 = 1,085.10/x
3. Step 3: Cross multiply
   1,870.60x = 2,581.42 × 1,085.10
4. Step 4: Simplify right side
   1,870.60x = 2,801,093.42
5. Step 5: Solve for x
   x = 2,801,093.42/1,870.60
6. Step 6: Final answer
   x = 1,497.43