Finding the Fourth Proportional to 2,991.75, 4,465.72 and 2,774.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.75 : 4,465.72 = 2,774.90 : x
2. Step 2: Convert to fraction form
   2,991.75/4,465.72 = 2,774.90/x
3. Step 3: Cross multiply
   2,991.75x = 4,465.72 × 2,774.90
4. Step 4: Simplify right side
   2,991.75x = 12,391,941.06
5. Step 5: Solve for x
   x = 12,391,941.06/2,991.75
6. Step 6: Final answer
   x = 4,142.04