Finding the Fourth Proportional to 3,689.64, 5,092.38 and 2,118.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.64 : 5,092.38 = 2,118.69 : x
2. Step 2: Convert to fraction form
   3,689.64/5,092.38 = 2,118.69/x
3. Step 3: Cross multiply
   3,689.64x = 5,092.38 × 2,118.69
4. Step 4: Simplify right side
   3,689.64x = 10,789,174.58
5. Step 5: Solve for x
   x = 10,789,174.58/3,689.64
6. Step 6: Final answer
   x = 2,924.18