Finding the Third Proportional to 2,389.78 and 3,572.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.78 : 3,572.16 = 3,572.16 : x
2. Step 2: Convert to fraction form
   2,389.78/3,572.16 = 3,572.16/x
3. Step 3: Cross multiply
   2,389.78x = 3,572.16 × 3,572.16
4. Step 4: Simplify right side
   2,389.78x = 12,760,300.27
5. Step 5: Solve for x
   x = 12,760,300.27/2,389.78
6. Step 6: Final answer
   x = 5,339.53