Finding the Fourth Proportional to 3,690.63, 5,093.15 and 2,118.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,690.63 : 5,093.15 = 2,118.69 : x
2. Step 2: Convert to fraction form
   3,690.63/5,093.15 = 2,118.69/x
3. Step 3: Cross multiply
   3,690.63x = 5,093.15 × 2,118.69
4. Step 4: Simplify right side
   3,690.63x = 10,790,795.38
5. Step 5: Solve for x
   x = 10,790,795.38/3,690.63
6. Step 6: Final answer
   x = 2,923.84