Finding the Fourth Proportional to 1,449.78, 2,173.59 and 872.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.78 : 2,173.59 = 872.52 : x
2. Step 2: Convert to fraction form
   1,449.78/2,173.59 = 872.52/x
3. Step 3: Cross multiply
   1,449.78x = 2,173.59 × 872.52
4. Step 4: Simplify right side
   1,449.78x = 1,896,500.75
5. Step 5: Solve for x
   x = 1,896,500.75/1,449.78
6. Step 6: Final answer
   x = 1,308.13