Finding the Third Proportional to 64,398.38 and 139,886.16

Step by Step Solution

1. Step 1: Write the proportion equation
   64,398.38 : 139,886.16 = 139,886.16 : x
2. Step 2: Convert to fraction form
   64,398.38/139,886.16 = 139,886.16/x
3. Step 3: Cross multiply
   64,398.38x = 139,886.16 × 139,886.16
4. Step 4: Simplify right side
   64,398.38x = 19,568,136,710.40
5. Step 5: Solve for x
   x = 19,568,136,710.40/64,398.38
6. Step 6: Final answer
   x = 303,860.72