Finding the Fourth Proportional to 2,622.01, 3,932.16 and 866.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.01 : 3,932.16 = 866.60 : x
2. Step 2: Convert to fraction form
   2,622.01/3,932.16 = 866.60/x
3. Step 3: Cross multiply
   2,622.01x = 3,932.16 × 866.60
4. Step 4: Simplify right side
   2,622.01x = 3,407,619.69
5. Step 5: Solve for x
   x = 3,407,619.69/2,622.01
6. Step 6: Final answer
   x = 1,299.62