Finding the Fourth Proportional to 2,662.62, 3,991.99 and 1,256.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.62 : 3,991.99 = 1,256.54 : x
2. Step 2: Convert to fraction form
   2,662.62/3,991.99 = 1,256.54/x
3. Step 3: Cross multiply
   2,662.62x = 3,991.99 × 1,256.54
4. Step 4: Simplify right side
   2,662.62x = 5,016,095.11
5. Step 5: Solve for x
   x = 5,016,095.11/2,662.62
6. Step 6: Final answer
   x = 1,883.89