Finding the Third Proportional to 64,698.50 and 137,173

Step by Step Solution

1. Step 1: Write the proportion equation
   64,698.50 : 137,173 = 137,173 : x
2. Step 2: Convert to fraction form
   64,698.50/137,173 = 137,173/x
3. Step 3: Cross multiply
   64,698.50x = 137,173 × 137,173
4. Step 4: Simplify right side
   64,698.50x = 18,816,431,929
5. Step 5: Solve for x
   x = 18,816,431,929/64,698.50
6. Step 6: Final answer
   x = 290,832.58