Finding the Fourth Proportional to 3,690.92, 5,092.86 and 2,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.92 : 5,092.86 = 2,118.72 : x
2. Step 2: Convert to fraction form
   3,690.92/5,092.86 = 2,118.72/x
3. Step 3: Cross multiply
   3,690.92x = 5,092.86 × 2,118.72
4. Step 4: Simplify right side
   3,690.92x = 10,790,344.34
5. Step 5: Solve for x
   x = 10,790,344.34/3,690.92
6. Step 6: Final answer
   x = 2,923.48