Finding the Fourth Proportional to 2,080.39, 2,870.96 and 1,148.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.39 : 2,870.96 = 1,148.89 : x
2. Step 2: Convert to fraction form
   2,080.39/2,870.96 = 1,148.89/x
3. Step 3: Cross multiply
   2,080.39x = 2,870.96 × 1,148.89
4. Step 4: Simplify right side
   2,080.39x = 3,298,411.49
5. Step 5: Solve for x
   x = 3,298,411.49/2,080.39
6. Step 6: Final answer
   x = 1,585.48