Finding the Fourth Proportional to 2,548.17, 3,516.78 and 1,428.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.17 : 3,516.78 = 1,428.89 : x
2. Step 2: Convert to fraction form
   2,548.17/3,516.78 = 1,428.89/x
3. Step 3: Cross multiply
   2,548.17x = 3,516.78 × 1,428.89
4. Step 4: Simplify right side
   2,548.17x = 5,025,074.19
5. Step 5: Solve for x
   x = 5,025,074.19/2,548.17
6. Step 6: Final answer
   x = 1,972.03