Finding the Third Proportional to 64,809 and 99,973.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,809 : 99,973.50 = 99,973.50 : x
2. Step 2: Convert to fraction form
   64,809/99,973.50 = 99,973.50/x
3. Step 3: Cross multiply
   64,809x = 99,973.50 × 99,973.50
4. Step 4: Simplify right side
   64,809x = 9,994,700,702.25
5. Step 5: Solve for x
   x = 9,994,700,702.25/64,809
6. Step 6: Final answer
   x = 154,217.79