Finding the Fourth Proportional to 3,908.94, 5,388.72 and 2,787.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908.94 : 5,388.72 = 2,787.93 : x
2. Step 2: Convert to fraction form
   3,908.94/5,388.72 = 2,787.93/x
3. Step 3: Cross multiply
   3,908.94x = 5,388.72 × 2,787.93
4. Step 4: Simplify right side
   3,908.94x = 15,023,374.15
5. Step 5: Solve for x
   x = 15,023,374.15/3,908.94
6. Step 6: Final answer
   x = 3,843.34