Finding the Third Proportional to 85,987.88 and 123,854.63

Step by Step Solution

1. Step 1: Write the proportion equation
   85,987.88 : 123,854.63 = 123,854.63 : x
2. Step 2: Convert to fraction form
   85,987.88/123,854.63 = 123,854.63/x
3. Step 3: Cross multiply
   85,987.88x = 123,854.63 × 123,854.63
4. Step 4: Simplify right side
   85,987.88x = 15,339,968,133.89
5. Step 5: Solve for x
   x = 15,339,968,133.89/85,987.88
6. Step 6: Final answer
   x = 178,396.87