Finding the Third Proportional to 39,871.69 and 64,242

Step by Step Solution

1. Step 1: Write the proportion equation
   39,871.69 : 64,242 = 64,242 : x
2. Step 2: Convert to fraction form
   39,871.69/64,242 = 64,242/x
3. Step 3: Cross multiply
   39,871.69x = 64,242 × 64,242
4. Step 4: Simplify right side
   39,871.69x = 4,127,034,564
5. Step 5: Solve for x
   x = 4,127,034,564/39,871.69
6. Step 6: Final answer
   x = 103,507.90