Finding the Third Proportional to 64,600.50 and 137,028

Step by Step Solution

1. Step 1: Write the proportion equation
   64,600.50 : 137,028 = 137,028 : x
2. Step 2: Convert to fraction form
   64,600.50/137,028 = 137,028/x
3. Step 3: Cross multiply
   64,600.50x = 137,028 × 137,028
4. Step 4: Simplify right side
   64,600.50x = 18,776,672,784
5. Step 5: Solve for x
   x = 18,776,672,784/64,600.50
6. Step 6: Final answer
   x = 290,658.32