Finding the Fourth Proportional to 3,690.28, 5,092.02 and 2,118.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.28 : 5,092.02 = 2,118.10 : x
2. Step 2: Convert to fraction form
   3,690.28/5,092.02 = 2,118.10/x
3. Step 3: Cross multiply
   3,690.28x = 5,092.02 × 2,118.10
4. Step 4: Simplify right side
   3,690.28x = 10,785,407.56
5. Step 5: Solve for x
   x = 10,785,407.56/3,690.28
6. Step 6: Final answer
   x = 2,922.65