Finding the Fourth Proportional to 3,689.52, 5,091.52 and 2,118.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.52 : 5,091.52 = 2,118.12 : x
2. Step 2: Convert to fraction form
   3,689.52/5,091.52 = 2,118.12/x
3. Step 3: Cross multiply
   3,689.52x = 5,091.52 × 2,118.12
4. Step 4: Simplify right side
   3,689.52x = 10,784,450.34
5. Step 5: Solve for x
   x = 10,784,450.34/3,689.52
6. Step 6: Final answer
   x = 2,923.00