Finding the Third Proportional to 138,118.50 and 295,839

Step by Step Solution

1. Step 1: Write the proportion equation
   138,118.50 : 295,839 = 295,839 : x
2. Step 2: Convert to fraction form
   138,118.50/295,839 = 295,839/x
3. Step 3: Cross multiply
   138,118.50x = 295,839 × 295,839
4. Step 4: Simplify right side
   138,118.50x = 87,520,713,921
5. Step 5: Solve for x
   x = 87,520,713,921/138,118.50
6. Step 6: Final answer
   x = 633,663.95