Finding the Third Proportional to 64,039.25 and 139,153

Step by Step Solution

1. Step 1: Write the proportion equation
   64,039.25 : 139,153 = 139,153 : x
2. Step 2: Convert to fraction form
   64,039.25/139,153 = 139,153/x
3. Step 3: Cross multiply
   64,039.25x = 139,153 × 139,153
4. Step 4: Simplify right side
   64,039.25x = 19,363,557,409
5. Step 5: Solve for x
   x = 19,363,557,409/64,039.25
6. Step 6: Final answer
   x = 302,370.15