Finding the Third Proportional to 19,640.38 and 42,393.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,640.38 : 42,393.25 = 42,393.25 : x
2. Step 2: Convert to fraction form
   19,640.38/42,393.25 = 42,393.25/x
3. Step 3: Cross multiply
   19,640.38x = 42,393.25 × 42,393.25
4. Step 4: Simplify right side
   19,640.38x = 1,797,187,645.56
5. Step 5: Solve for x
   x = 1,797,187,645.56/19,640.38
6. Step 6: Final answer
   x = 91,504.75