Finding the Third Proportional to 20,386.69 and 42,616.13

Step by Step Solution

1. Step 1: Write the proportion equation
   20,386.69 : 42,616.13 = 42,616.13 : x
2. Step 2: Convert to fraction form
   20,386.69/42,616.13 = 42,616.13/x
3. Step 3: Cross multiply
   20,386.69x = 42,616.13 × 42,616.13
4. Step 4: Simplify right side
   20,386.69x = 1,816,134,110.02
5. Step 5: Solve for x
   x = 1,816,134,110.02/20,386.69
6. Step 6: Final answer
   x = 89,084.32