Finding the Third Proportional to 131,116.50 and 277,920

Step by Step Solution

1. Step 1: Write the proportion equation
   131,116.50 : 277,920 = 277,920 : x
2. Step 2: Convert to fraction form
   131,116.50/277,920 = 277,920/x
3. Step 3: Cross multiply
   131,116.50x = 277,920 × 277,920
4. Step 4: Simplify right side
   131,116.50x = 77,239,526,400
5. Step 5: Solve for x
   x = 77,239,526,400/131,116.50
6. Step 6: Final answer
   x = 589,090.82