Finding the Fourth Proportional to 1,665.90, 2,496.72 and 886.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.90 : 2,496.72 = 886.27 : x
2. Step 2: Convert to fraction form
   1,665.90/2,496.72 = 886.27/x
3. Step 3: Cross multiply
   1,665.90x = 2,496.72 × 886.27
4. Step 4: Simplify right side
   1,665.90x = 2,212,768.03
5. Step 5: Solve for x
   x = 2,212,768.03/1,665.90
6. Step 6: Final answer
   x = 1,328.27