Finding the Fourth Proportional to 1,452.72, 2,178.81 and 575.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,452.72 : 2,178.81 = 575.61 : x
2. Step 2: Convert to fraction form
   1,452.72/2,178.81 = 575.61/x
3. Step 3: Cross multiply
   1,452.72x = 2,178.81 × 575.61
4. Step 4: Simplify right side
   1,452.72x = 1,254,144.82
5. Step 5: Solve for x
   x = 1,254,144.82/1,452.72
6. Step 6: Final answer
   x = 863.31