Finding the Third Proportional to 130,920 and 277,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   130,920 : 277,390.50 = 277,390.50 : x
2. Step 2: Convert to fraction form
   130,920/277,390.50 = 277,390.50/x
3. Step 3: Cross multiply
   130,920x = 277,390.50 × 277,390.50
4. Step 4: Simplify right side
   130,920x = 76,945,489,490.25
5. Step 5: Solve for x
   x = 76,945,489,490.25/130,920
6. Step 6: Final answer
   x = 587,729.07