Finding the Third Proportional to 86,592 and 138,331.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,592 : 138,331.50 = 138,331.50 : x
2. Step 2: Convert to fraction form
   86,592/138,331.50 = 138,331.50/x
3. Step 3: Cross multiply
   86,592x = 138,331.50 × 138,331.50
4. Step 4: Simplify right side
   86,592x = 19,135,603,892.25
5. Step 5: Solve for x
   x = 19,135,603,892.25/86,592
6. Step 6: Final answer
   x = 220,985.82