Finding the Fourth Proportional to 2,547.15, 3,514.98 and 1,428.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.15 : 3,514.98 = 1,428.27 : x
2. Step 2: Convert to fraction form
   2,547.15/3,514.98 = 1,428.27/x
3. Step 3: Cross multiply
   2,547.15x = 3,514.98 × 1,428.27
4. Step 4: Simplify right side
   2,547.15x = 5,020,340.48
5. Step 5: Solve for x
   x = 5,020,340.48/2,547.15
6. Step 6: Final answer
   x = 1,970.96