Finding the Fourth Proportional to 2,526.88, 3,487.12 and 1,392.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,526.88 : 3,487.12 = 1,392.48 : x
2. Step 2: Convert to fraction form
   2,526.88/3,487.12 = 1,392.48/x
3. Step 3: Cross multiply
   2,526.88x = 3,487.12 × 1,392.48
4. Step 4: Simplify right side
   2,526.88x = 4,855,744.86
5. Step 5: Solve for x
   x = 4,855,744.86/2,526.88
6. Step 6: Final answer
   x = 1,921.64