Finding the Fourth Proportional to 2,389.72, 3,289.63 and 2,073.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.72 : 3,289.63 = 2,073.12 : x
2. Step 2: Convert to fraction form
   2,389.72/3,289.63 = 2,073.12/x
3. Step 3: Cross multiply
   2,389.72x = 3,289.63 × 2,073.12
4. Step 4: Simplify right side
   2,389.72x = 6,819,784.62
5. Step 5: Solve for x
   x = 6,819,784.62/2,389.72
6. Step 6: Final answer
   x = 2,853.80