Finding the Fourth Proportional to 2,142.16, 3,213.28 and 755.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.16 : 3,213.28 = 755.52 : x
2. Step 2: Convert to fraction form
   2,142.16/3,213.28 = 755.52/x
3. Step 3: Cross multiply
   2,142.16x = 3,213.28 × 755.52
4. Step 4: Simplify right side
   2,142.16x = 2,427,697.31
5. Step 5: Solve for x
   x = 2,427,697.31/2,142.16
6. Step 6: Final answer
   x = 1,133.29