Finding the Fourth Proportional to 3,690.28, 5,091.96 and 2,118.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.28 : 5,091.96 = 2,118.34 : x
2. Step 2: Convert to fraction form
   3,690.28/5,091.96 = 2,118.34/x
3. Step 3: Cross multiply
   3,690.28x = 5,091.96 × 2,118.34
4. Step 4: Simplify right side
   3,690.28x = 10,786,502.55
5. Step 5: Solve for x
   x = 10,786,502.55/3,690.28
6. Step 6: Final answer
   x = 2,922.95