Finding the Fourth Proportional to 2,665.05, 3,997.63 and 910.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.05 : 3,997.63 = 910.46 : x
2. Step 2: Convert to fraction form
   2,665.05/3,997.63 = 910.46/x
3. Step 3: Cross multiply
   2,665.05x = 3,997.63 × 910.46
4. Step 4: Simplify right side
   2,665.05x = 3,639,679.49
5. Step 5: Solve for x
   x = 3,639,679.49/2,665.05
6. Step 6: Final answer
   x = 1,365.71