Finding the Fourth Proportional to 3,690.18, 5,092.73 and 2,118.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.18 : 5,092.73 = 2,118.78 : x
2. Step 2: Convert to fraction form
   3,690.18/5,092.73 = 2,118.78/x
3. Step 3: Cross multiply
   3,690.18x = 5,092.73 × 2,118.78
4. Step 4: Simplify right side
   3,690.18x = 10,790,374.47
5. Step 5: Solve for x
   x = 10,790,374.47/3,690.18
6. Step 6: Final answer
   x = 2,924.08