Finding the Fourth Proportional to 2,547.18, 3,514.86 and 1,428.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.18 : 3,514.86 = 1,428.30 : x
2. Step 2: Convert to fraction form
   2,547.18/3,514.86 = 1,428.30/x
3. Step 3: Cross multiply
   2,547.18x = 3,514.86 × 1,428.30
4. Step 4: Simplify right side
   2,547.18x = 5,020,274.54
5. Step 5: Solve for x
   x = 5,020,274.54/2,547.18
6. Step 6: Final answer
   x = 1,970.91