Finding the Third Proportional to 39,099 and 81,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,099 : 81,100.50 = 81,100.50 : x
2. Step 2: Convert to fraction form
   39,099/81,100.50 = 81,100.50/x
3. Step 3: Cross multiply
   39,099x = 81,100.50 × 81,100.50
4. Step 4: Simplify right side
   39,099x = 6,577,291,100.25
5. Step 5: Solve for x
   x = 6,577,291,100.25/39,099
6. Step 6: Final answer
   x = 168,221.47