Finding the Fourth Proportional to 3,763.89, 5,184.72 and 2,878.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,763.89 : 5,184.72 = 2,878.20 : x
2. Step 2: Convert to fraction form
   3,763.89/5,184.72 = 2,878.20/x
3. Step 3: Cross multiply
   3,763.89x = 5,184.72 × 2,878.20
4. Step 4: Simplify right side
   3,763.89x = 14,922,661.10
5. Step 5: Solve for x
   x = 14,922,661.10/3,763.89
6. Step 6: Final answer
   x = 3,964.69