Finding the Fourth Proportional to 3,787.72, 5,225.37 and 2,215.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,787.72 : 5,225.37 = 2,215.12 : x
2. Step 2: Convert to fraction form
   3,787.72/5,225.37 = 2,215.12/x
3. Step 3: Cross multiply
   3,787.72x = 5,225.37 × 2,215.12
4. Step 4: Simplify right side
   3,787.72x = 11,574,821.59
5. Step 5: Solve for x
   x = 11,574,821.59/3,787.72
6. Step 6: Final answer
   x = 3,055.88