Finding the Third Proportional to 63,819 and 139,905

Step by Step Solution

1. Step 1: Write the proportion equation
   63,819 : 139,905 = 139,905 : x
2. Step 2: Convert to fraction form
   63,819/139,905 = 139,905/x
3. Step 3: Cross multiply
   63,819x = 139,905 × 139,905
4. Step 4: Simplify right side
   63,819x = 19,573,409,025
5. Step 5: Solve for x
   x = 19,573,409,025/63,819
6. Step 6: Final answer
   x = 306,701.91