Finding the Fourth Proportional to 2,656.72, 3,986.34 and 1,425.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.72 : 3,986.34 = 1,425.16 : x
2. Step 2: Convert to fraction form
   2,656.72/3,986.34 = 1,425.16/x
3. Step 3: Cross multiply
   2,656.72x = 3,986.34 × 1,425.16
4. Step 4: Simplify right side
   2,656.72x = 5,681,172.31
5. Step 5: Solve for x
   x = 5,681,172.31/2,656.72
6. Step 6: Final answer
   x = 2,138.42