Finding the Third Proportional to 85,171.50 and 115,719.89

Step by Step Solution

1. Step 1: Write the proportion equation
   85,171.50 : 115,719.89 = 115,719.89 : x
2. Step 2: Convert to fraction form
   85,171.50/115,719.89 = 115,719.89/x
3. Step 3: Cross multiply
   85,171.50x = 115,719.89 × 115,719.89
4. Step 4: Simplify right side
   85,171.50x = 13,391,093,086.26
5. Step 5: Solve for x
   x = 13,391,093,086.26/85,171.50
6. Step 6: Final answer
   x = 157,225.05