Finding the Third Proportional to 138,516 and 303,305.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,516 : 303,305.50 = 303,305.50 : x
2. Step 2: Convert to fraction form
   138,516/303,305.50 = 303,305.50/x
3. Step 3: Cross multiply
   138,516x = 303,305.50 × 303,305.50
4. Step 4: Simplify right side
   138,516x = 91,994,226,330.25
5. Step 5: Solve for x
   x = 91,994,226,330.25/138,516
6. Step 6: Final answer
   x = 664,141.52