Finding the Fourth Proportional to 1,488.94, 2,232.68 and 872.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.94 : 2,232.68 = 872.82 : x
2. Step 2: Convert to fraction form
   1,488.94/2,232.68 = 872.82/x
3. Step 3: Cross multiply
   1,488.94x = 2,232.68 × 872.82
4. Step 4: Simplify right side
   1,488.94x = 1,948,727.76
5. Step 5: Solve for x
   x = 1,948,727.76/1,488.94
6. Step 6: Final answer
   x = 1,308.80