Finding the Fourth Proportional to 2,152.56, 3,222.36 and 1,288.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.56 : 3,222.36 = 1,288.56 : x
2. Step 2: Convert to fraction form
   2,152.56/3,222.36 = 1,288.56/x
3. Step 3: Cross multiply
   2,152.56x = 3,222.36 × 1,288.56
4. Step 4: Simplify right side
   2,152.56x = 4,152,204.20
5. Step 5: Solve for x
   x = 4,152,204.20/2,152.56
6. Step 6: Final answer
   x = 1,928.96