Finding the Fourth Proportional to 3,870.72, 5,340.33 and 2,692.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.72 : 5,340.33 = 2,692.17 : x
2. Step 2: Convert to fraction form
   3,870.72/5,340.33 = 2,692.17/x
3. Step 3: Cross multiply
   3,870.72x = 5,340.33 × 2,692.17
4. Step 4: Simplify right side
   3,870.72x = 14,377,076.22
5. Step 5: Solve for x
   x = 14,377,076.22/3,870.72
6. Step 6: Final answer
   x = 3,714.32