Finding the Fourth Proportional to 5,144.77, 7,099.78 and 2,786.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,144.77 : 7,099.78 = 2,786.91 : x
2. Step 2: Convert to fraction form
   5,144.77/7,099.78 = 2,786.91/x
3. Step 3: Cross multiply
   5,144.77x = 7,099.78 × 2,786.91
4. Step 4: Simplify right side
   5,144.77x = 19,786,411.68
5. Step 5: Solve for x
   x = 19,786,411.68/5,144.77
6. Step 6: Final answer
   x = 3,845.93