Finding the Third Proportional to 61,217.44 and 86,698.69

Step by Step Solution

1. Step 1: Write the proportion equation
   61,217.44 : 86,698.69 = 86,698.69 : x
2. Step 2: Convert to fraction form
   61,217.44/86,698.69 = 86,698.69/x
3. Step 3: Cross multiply
   61,217.44x = 86,698.69 × 86,698.69
4. Step 4: Simplify right side
   61,217.44x = 7,516,662,414.22
5. Step 5: Solve for x
   x = 7,516,662,414.22/61,217.44
6. Step 6: Final answer
   x = 122,786.30