Finding the Third Proportional to 64,636.73 and 99,680.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,636.73 : 99,680.63 = 99,680.63 : x
2. Step 2: Convert to fraction form
   64,636.73/99,680.63 = 99,680.63/x
3. Step 3: Cross multiply
   64,636.73x = 99,680.63 × 99,680.63
4. Step 4: Simplify right side
   64,636.73x = 9,936,227,000.39
5. Step 5: Solve for x
   x = 9,936,227,000.39/64,636.73
6. Step 6: Final answer
   x = 153,724.15