Finding the Third Proportional to 64,315 and 139,362.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,315 : 139,362.50 = 139,362.50 : x
2. Step 2: Convert to fraction form
   64,315/139,362.50 = 139,362.50/x
3. Step 3: Cross multiply
   64,315x = 139,362.50 × 139,362.50
4. Step 4: Simplify right side
   64,315x = 19,421,906,406.25
5. Step 5: Solve for x
   x = 19,421,906,406.25/64,315
6. Step 6: Final answer
   x = 301,980.97