Finding the Third Proportional to 64,707.38 and 138,410.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,707.38 : 138,410.63 = 138,410.63 : x
2. Step 2: Convert to fraction form
   64,707.38/138,410.63 = 138,410.63/x
3. Step 3: Cross multiply
   64,707.38x = 138,410.63 × 138,410.63
4. Step 4: Simplify right side
   64,707.38x = 19,157,501,112.89
5. Step 5: Solve for x
   x = 19,157,501,112.89/64,707.38
6. Step 6: Final answer
   x = 296,063.64