Finding the Fourth Proportional to 3,687.39, 5,088.57 and 2,116.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,687.39 : 5,088.57 = 2,116.38 : x
2. Step 2: Convert to fraction form
   3,687.39/5,088.57 = 2,116.38/x
3. Step 3: Cross multiply
   3,687.39x = 5,088.57 × 2,116.38
4. Step 4: Simplify right side
   3,687.39x = 10,769,347.78
5. Step 5: Solve for x
   x = 10,769,347.78/3,687.39
6. Step 6: Final answer
   x = 2,920.59