Finding the Third Proportional to 39,939.75 and 86,926.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,939.75 : 86,926.50 = 86,926.50 : x
2. Step 2: Convert to fraction form
   39,939.75/86,926.50 = 86,926.50/x
3. Step 3: Cross multiply
   39,939.75x = 86,926.50 × 86,926.50
4. Step 4: Simplify right side
   39,939.75x = 7,556,216,402.25
5. Step 5: Solve for x
   x = 7,556,216,402.25/39,939.75
6. Step 6: Final answer
   x = 189,190.38