Finding the Third Proportional to 64,719.50 and 138,437

Step by Step Solution

1. Step 1: Write the proportion equation
   64,719.50 : 138,437 = 138,437 : x
2. Step 2: Convert to fraction form
   64,719.50/138,437 = 138,437/x
3. Step 3: Cross multiply
   64,719.50x = 138,437 × 138,437
4. Step 4: Simplify right side
   64,719.50x = 19,164,802,969
5. Step 5: Solve for x
   x = 19,164,802,969/64,719.50
6. Step 6: Final answer
   x = 296,121.00