Finding the Third Proportional to 19,640.75 and 42,419.13

Step by Step Solution

1. Step 1: Write the proportion equation
   19,640.75 : 42,419.13 = 42,419.13 : x
2. Step 2: Convert to fraction form
   19,640.75/42,419.13 = 42,419.13/x
3. Step 3: Cross multiply
   19,640.75x = 42,419.13 × 42,419.13
4. Step 4: Simplify right side
   19,640.75x = 1,799,382,165.77
5. Step 5: Solve for x
   x = 1,799,382,165.77/19,640.75
6. Step 6: Final answer
   x = 91,614.74