Finding the Third Proportional to 71,721 and 148,603.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,721 : 148,603.50 = 148,603.50 : x
2. Step 2: Convert to fraction form
   71,721/148,603.50 = 148,603.50/x
3. Step 3: Cross multiply
   71,721x = 148,603.50 × 148,603.50
4. Step 4: Simplify right side
   71,721x = 22,083,000,212.25
5. Step 5: Solve for x
   x = 22,083,000,212.25/71,721
6. Step 6: Final answer
   x = 307,901.45