Finding the Fourth Proportional to 2,521.88, 3,781.12 and 1,288.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.88 : 3,781.12 = 1,288.28 : x
2. Step 2: Convert to fraction form
   2,521.88/3,781.12 = 1,288.28/x
3. Step 3: Cross multiply
   2,521.88x = 3,781.12 × 1,288.28
4. Step 4: Simplify right side
   2,521.88x = 4,871,137.48
5. Step 5: Solve for x
   x = 4,871,137.48/2,521.88
6. Step 6: Final answer
   x = 1,931.55