Finding the Third Proportional to 64,251.38 and 139,228.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,251.38 : 139,228.50 = 139,228.50 : x
2. Step 2: Convert to fraction form
   64,251.38/139,228.50 = 139,228.50/x
3. Step 3: Cross multiply
   64,251.38x = 139,228.50 × 139,228.50
4. Step 4: Simplify right side
   64,251.38x = 19,384,575,212.25
5. Step 5: Solve for x
   x = 19,384,575,212.25/64,251.38
6. Step 6: Final answer
   x = 301,698.99