Finding the Third Proportional to 64,174.78 and 68,662.69

Step by Step Solution

1. Step 1: Write the proportion equation
   64,174.78 : 68,662.69 = 68,662.69 : x
2. Step 2: Convert to fraction form
   64,174.78/68,662.69 = 68,662.69/x
3. Step 3: Cross multiply
   64,174.78x = 68,662.69 × 68,662.69
4. Step 4: Simplify right side
   64,174.78x = 4,714,564,654.72
5. Step 5: Solve for x
   x = 4,714,564,654.72/64,174.78
6. Step 6: Final answer
   x = 73,464.44