Finding the Third Proportional to 138,900 and 303,634.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,900 : 303,634.50 = 303,634.50 : x
2. Step 2: Convert to fraction form
   138,900/303,634.50 = 303,634.50/x
3. Step 3: Cross multiply
   138,900x = 303,634.50 × 303,634.50
4. Step 4: Simplify right side
   138,900x = 92,193,909,590.25
5. Step 5: Solve for x
   x = 92,193,909,590.25/138,900
6. Step 6: Final answer
   x = 663,743.05