Finding the Fourth Proportional to 3,690.10, 5,092.05 and 2,117.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.10 : 5,092.05 = 2,117.86 : x
2. Step 2: Convert to fraction form
   3,690.10/5,092.05 = 2,117.86/x
3. Step 3: Cross multiply
   3,690.10x = 5,092.05 × 2,117.86
4. Step 4: Simplify right side
   3,690.10x = 10,784,249.01
5. Step 5: Solve for x
   x = 10,784,249.01/3,690.10
6. Step 6: Final answer
   x = 2,922.48