Finding the Fourth Proportional to 3,786.96, 5,225.40 and 2,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.96 : 5,225.40 = 2,388.72 : x
2. Step 2: Convert to fraction form
   3,786.96/5,225.40 = 2,388.72/x
3. Step 3: Cross multiply
   3,786.96x = 5,225.40 × 2,388.72
4. Step 4: Simplify right side
   3,786.96x = 12,482,017.49
5. Step 5: Solve for x
   x = 12,482,017.49/3,786.96
6. Step 6: Final answer
   x = 3,296.05