Finding the Fourth Proportional to 1,216.08, 1,674.72 and 866.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.08 : 1,674.72 = 866.16 : x
2. Step 2: Convert to fraction form
   1,216.08/1,674.72 = 866.16/x
3. Step 3: Cross multiply
   1,216.08x = 1,674.72 × 866.16
4. Step 4: Simplify right side
   1,216.08x = 1,450,575.48
5. Step 5: Solve for x
   x = 1,450,575.48/1,216.08
6. Step 6: Final answer
   x = 1,192.83