Finding the Fourth Proportional to 2,965.47, 4,448.43 and 991.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,965.47 : 4,448.43 = 991.05 : x
2. Step 2: Convert to fraction form
   2,965.47/4,448.43 = 991.05/x
3. Step 3: Cross multiply
   2,965.47x = 4,448.43 × 991.05
4. Step 4: Simplify right side
   2,965.47x = 4,408,616.55
5. Step 5: Solve for x
   x = 4,408,616.55/2,965.47
6. Step 6: Final answer
   x = 1,486.65