Finding the Third Proportional to 39,847.50 and 86,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,847.50 : 86,719.50 = 86,719.50 : x
2. Step 2: Convert to fraction form
   39,847.50/86,719.50 = 86,719.50/x
3. Step 3: Cross multiply
   39,847.50x = 86,719.50 × 86,719.50
4. Step 4: Simplify right side
   39,847.50x = 7,520,271,680.25
5. Step 5: Solve for x
   x = 7,520,271,680.25/39,847.50
6. Step 6: Final answer
   x = 188,726.31