Finding the Third Proportional to 63,426.66 and 139,408.31

Step by Step Solution

1. Step 1: Write the proportion equation
   63,426.66 : 139,408.31 = 139,408.31 : x
2. Step 2: Convert to fraction form
   63,426.66/139,408.31 = 139,408.31/x
3. Step 3: Cross multiply
   63,426.66x = 139,408.31 × 139,408.31
4. Step 4: Simplify right side
   63,426.66x = 19,434,677,594.10
5. Step 5: Solve for x
   x = 19,434,677,594.10/63,426.66
6. Step 6: Final answer
   x = 306,411.83