Finding the Fourth Proportional to 2,326.28, 3,488.88 and 866.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,326.28 : 3,488.88 = 866.12 : x
2. Step 2: Convert to fraction form
   2,326.28/3,488.88 = 866.12/x
3. Step 3: Cross multiply
   2,326.28x = 3,488.88 × 866.12
4. Step 4: Simplify right side
   2,326.28x = 3,021,788.75
5. Step 5: Solve for x
   x = 3,021,788.75/2,326.28
6. Step 6: Final answer
   x = 1,298.98