Finding the Fourth Proportional to 2,547.48, 3,515.00 and 1,428.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.48 : 3,515.00 = 1,428.27 : x
2. Step 2: Convert to fraction form
   2,547.48/3,515.00 = 1,428.27/x
3. Step 3: Cross multiply
   2,547.48x = 3,515.00 × 1,428.27
4. Step 4: Simplify right side
   2,547.48x = 5,020,348.73
5. Step 5: Solve for x
   x = 5,020,348.73/2,547.48
6. Step 6: Final answer
   x = 1,970.71