Finding the Fourth Proportional to 2,547.10, 3,515.16 and 1,665.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.10 : 3,515.16 = 1,665.28 : x
2. Step 2: Convert to fraction form
   2,547.10/3,515.16 = 1,665.28/x
3. Step 3: Cross multiply
   2,547.10x = 3,515.16 × 1,665.28
4. Step 4: Simplify right side
   2,547.10x = 5,853,725.64
5. Step 5: Solve for x
   x = 5,853,725.64/2,547.10
6. Step 6: Final answer
   x = 2,298.19