Finding the Third Proportional to 120,994.50 and 277,718

Step by Step Solution

1. Step 1: Write the proportion equation
   120,994.50 : 277,718 = 277,718 : x
2. Step 2: Convert to fraction form
   120,994.50/277,718 = 277,718/x
3. Step 3: Cross multiply
   120,994.50x = 277,718 × 277,718
4. Step 4: Simplify right side
   120,994.50x = 77,127,287,524
5. Step 5: Solve for x
   x = 77,127,287,524/120,994.50
6. Step 6: Final answer
   x = 637,444.57