Finding the Fourth Proportional to 3,787.86, 5,227.32 and 2,109.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,787.86 : 5,227.32 = 2,109.30 : x
2. Step 2: Convert to fraction form
   3,787.86/5,227.32 = 2,109.30/x
3. Step 3: Cross multiply
   3,787.86x = 5,227.32 × 2,109.30
4. Step 4: Simplify right side
   3,787.86x = 11,025,986.08
5. Step 5: Solve for x
   x = 11,025,986.08/3,787.86
6. Step 6: Final answer
   x = 2,910.87