Finding the Fourth Proportional to 2,547.95, 3,516.15 and 1,428.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,547.95 : 3,516.15 = 1,428.88 : x
2. Step 2: Convert to fraction form
   2,547.95/3,516.15 = 1,428.88/x
3. Step 3: Cross multiply
   2,547.95x = 3,516.15 × 1,428.88
4. Step 4: Simplify right side
   2,547.95x = 5,024,156.41
5. Step 5: Solve for x
   x = 5,024,156.41/2,547.95
6. Step 6: Final answer
   x = 1,971.84