Finding the Third Proportional to 85,991.63 and 123,860.25

Step by Step Solution

1. Step 1: Write the proportion equation
   85,991.63 : 123,860.25 = 123,860.25 : x
2. Step 2: Convert to fraction form
   85,991.63/123,860.25 = 123,860.25/x
3. Step 3: Cross multiply
   85,991.63x = 123,860.25 × 123,860.25
4. Step 4: Simplify right side
   85,991.63x = 15,341,361,530.06
5. Step 5: Solve for x
   x = 15,341,361,530.06/85,991.63
6. Step 6: Final answer
   x = 178,405.30