Finding the Fourth Proportional to 2,665.62, 3,996.90 and 910.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.62 : 3,996.90 = 910.05 : x
2. Step 2: Convert to fraction form
   2,665.62/3,996.90 = 910.05/x
3. Step 3: Cross multiply
   2,665.62x = 3,996.90 × 910.05
4. Step 4: Simplify right side
   2,665.62x = 3,637,378.85
5. Step 5: Solve for x
   x = 3,637,378.85/2,665.62
6. Step 6: Final answer
   x = 1,364.55