Finding the Fourth Proportional to 3,690.39, 5,092.74 and 2,118.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.39 : 5,092.74 = 2,118.38 : x
2. Step 2: Convert to fraction form
   3,690.39/5,092.74 = 2,118.38/x
3. Step 3: Cross multiply
   3,690.39x = 5,092.74 × 2,118.38
4. Step 4: Simplify right side
   3,690.39x = 10,788,333.10
5. Step 5: Solve for x
   x = 10,788,333.10/3,690.39
6. Step 6: Final answer
   x = 2,923.36