Finding the Fourth Proportional to 3,690.72, 5,092.47 and 2,118.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.72 : 5,092.47 = 2,118.24 : x
2. Step 2: Convert to fraction form
   3,690.72/5,092.47 = 2,118.24/x
3. Step 3: Cross multiply
   3,690.72x = 5,092.47 × 2,118.24
4. Step 4: Simplify right side
   3,690.72x = 10,787,073.65
5. Step 5: Solve for x
   x = 10,787,073.65/3,690.72
6. Step 6: Final answer
   x = 2,922.76