Finding the Fourth Proportional to 2,664.53, 3,997.07 and 909.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.53 : 3,997.07 = 909.71 : x
2. Step 2: Convert to fraction form
   2,664.53/3,997.07 = 909.71/x
3. Step 3: Cross multiply
   2,664.53x = 3,997.07 × 909.71
4. Step 4: Simplify right side
   2,664.53x = 3,636,150.02
5. Step 5: Solve for x
   x = 3,636,150.02/2,664.53
6. Step 6: Final answer
   x = 1,364.65