Finding the Fourth Proportional to 2,080.24, 2,870.88 and 1,148.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.24 : 2,870.88 = 1,148.72 : x
2. Step 2: Convert to fraction form
   2,080.24/2,870.88 = 1,148.72/x
3. Step 3: Cross multiply
   2,080.24x = 2,870.88 × 1,148.72
4. Step 4: Simplify right side
   2,080.24x = 3,297,837.27
5. Step 5: Solve for x
   x = 3,297,837.27/2,080.24
6. Step 6: Final answer
   x = 1,585.32