Finding the Third Proportional to 19,080.75 and 38,678.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,080.75 : 38,678.25 = 38,678.25 : x
2. Step 2: Convert to fraction form
   19,080.75/38,678.25 = 38,678.25/x
3. Step 3: Cross multiply
   19,080.75x = 38,678.25 × 38,678.25
4. Step 4: Simplify right side
   19,080.75x = 1,496,007,023.06
5. Step 5: Solve for x
   x = 1,496,007,023.06/19,080.75
6. Step 6: Final answer
   x = 78,403.99