Finding the Fourth Proportional to 1,606.56, 2,407.27 and 866.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.56 : 2,407.27 = 866.15 : x
2. Step 2: Convert to fraction form
   1,606.56/2,407.27 = 866.15/x
3. Step 3: Cross multiply
   1,606.56x = 2,407.27 × 866.15
4. Step 4: Simplify right side
   1,606.56x = 2,085,056.91
5. Step 5: Solve for x
   x = 2,085,056.91/1,606.56
6. Step 6: Final answer
   x = 1,297.84