Finding the Third Proportional to 20,939.63 and 45,642.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,939.63 : 45,642.38 = 45,642.38 : x
2. Step 2: Convert to fraction form
   20,939.63/45,642.38 = 45,642.38/x
3. Step 3: Cross multiply
   20,939.63x = 45,642.38 × 45,642.38
4. Step 4: Simplify right side
   20,939.63x = 2,083,226,395.64
5. Step 5: Solve for x
   x = 2,083,226,395.64/20,939.63
6. Step 6: Final answer
   x = 99,487.28