Finding the Third Proportional to 19,451.63 and 39,615.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,451.63 : 39,615.75 = 39,615.75 : x
2. Step 2: Convert to fraction form
   19,451.63/39,615.75 = 39,615.75/x
3. Step 3: Cross multiply
   19,451.63x = 39,615.75 × 39,615.75
4. Step 4: Simplify right side
   19,451.63x = 1,569,407,648.06
5. Step 5: Solve for x
   x = 1,569,407,648.06/19,451.63
6. Step 6: Final answer
   x = 80,682.60