Finding the Third Proportional to 63,428.06 and 139,410.56

Step by Step Solution

1. Step 1: Write the proportion equation
   63,428.06 : 139,410.56 = 139,410.56 : x
2. Step 2: Convert to fraction form
   63,428.06/139,410.56 = 139,410.56/x
3. Step 3: Cross multiply
   63,428.06x = 139,410.56 × 139,410.56
4. Step 4: Simplify right side
   63,428.06x = 19,435,304,936.57
5. Step 5: Solve for x
   x = 19,435,304,936.57/63,428.06
6. Step 6: Final answer
   x = 306,414.92