Finding the Third Proportional to 9,615.38 and 19,878.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,615.38 : 19,878.75 = 19,878.75 : x
2. Step 2: Convert to fraction form
   9,615.38/19,878.75 = 19,878.75/x
3. Step 3: Cross multiply
   9,615.38x = 19,878.75 × 19,878.75
4. Step 4: Simplify right side
   9,615.38x = 395,164,701.56
5. Step 5: Solve for x
   x = 395,164,701.56/9,615.38
6. Step 6: Final answer
   x = 41,097.17