Finding the Third Proportional to 61,389.77 and 86,651.33

Step by Step Solution

1. Step 1: Write the proportion equation
   61,389.77 : 86,651.33 = 86,651.33 : x
2. Step 2: Convert to fraction form
   61,389.77/86,651.33 = 86,651.33/x
3. Step 3: Cross multiply
   61,389.77x = 86,651.33 × 86,651.33
4. Step 4: Simplify right side
   61,389.77x = 7,508,453,342.79
5. Step 5: Solve for x
   x = 7,508,453,342.79/61,389.77
6. Step 6: Final answer
   x = 122,307.88