Finding the Third Proportional to 79,221 and 123,691.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,221 : 123,691.50 = 123,691.50 : x
2. Step 2: Convert to fraction form
   79,221/123,691.50 = 123,691.50/x
3. Step 3: Cross multiply
   79,221x = 123,691.50 × 123,691.50
4. Step 4: Simplify right side
   79,221x = 15,299,587,172.25
5. Step 5: Solve for x
   x = 15,299,587,172.25/79,221
6. Step 6: Final answer
   x = 193,125.40