Finding the Third Proportional to 64,437.50 and 139,945

Step by Step Solution

1. Step 1: Write the proportion equation
   64,437.50 : 139,945 = 139,945 : x
2. Step 2: Convert to fraction form
   64,437.50/139,945 = 139,945/x
3. Step 3: Cross multiply
   64,437.50x = 139,945 × 139,945
4. Step 4: Simplify right side
   64,437.50x = 19,584,603,025
5. Step 5: Solve for x
   x = 19,584,603,025/64,437.50
6. Step 6: Final answer
   x = 303,931.76