Finding the Fourth Proportional to 1,396.57, 1,928.17 and 866.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.57 : 1,928.17 = 866.02 : x
2. Step 2: Convert to fraction form
   1,396.57/1,928.17 = 866.02/x
3. Step 3: Cross multiply
   1,396.57x = 1,928.17 × 866.02
4. Step 4: Simplify right side
   1,396.57x = 1,669,830.05
5. Step 5: Solve for x
   x = 1,669,830.05/1,396.57
6. Step 6: Final answer
   x = 1,195.66