Finding the Third Proportional to 64,700.50 and 137,177

Step by Step Solution

1. Step 1: Write the proportion equation
   64,700.50 : 137,177 = 137,177 : x
2. Step 2: Convert to fraction form
   64,700.50/137,177 = 137,177/x
3. Step 3: Cross multiply
   64,700.50x = 137,177 × 137,177
4. Step 4: Simplify right side
   64,700.50x = 18,817,529,329
5. Step 5: Solve for x
   x = 18,817,529,329/64,700.50
6. Step 6: Final answer
   x = 290,840.56