Finding the Third Proportional to 64,306.50 and 139,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,306.50 : 139,345.50 = 139,345.50 : x
2. Step 2: Convert to fraction form
   64,306.50/139,345.50 = 139,345.50/x
3. Step 3: Cross multiply
   64,306.50x = 139,345.50 × 139,345.50
4. Step 4: Simplify right side
   64,306.50x = 19,417,168,370.25
5. Step 5: Solve for x
   x = 19,417,168,370.25/64,306.50
6. Step 6: Final answer
   x = 301,947.21