Finding the Third Proportional to 48,408 and 69,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   48,408 : 69,721.50 = 69,721.50 : x
2. Step 2: Convert to fraction form
   48,408/69,721.50 = 69,721.50/x
3. Step 3: Cross multiply
   48,408x = 69,721.50 × 69,721.50
4. Step 4: Simplify right side
   48,408x = 4,861,087,562.25
5. Step 5: Solve for x
   x = 4,861,087,562.25/48,408
6. Step 6: Final answer
   x = 100,419.10