Finding the Third Proportional to 19,290 and 39,116.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,290 : 39,116.25 = 39,116.25 : x
2. Step 2: Convert to fraction form
   19,290/39,116.25 = 39,116.25/x
3. Step 3: Cross multiply
   19,290x = 39,116.25 × 39,116.25
4. Step 4: Simplify right side
   19,290x = 1,530,081,014.06
5. Step 5: Solve for x
   x = 1,530,081,014.06/19,290
6. Step 6: Final answer
   x = 79,319.91