Finding the Third Proportional to 155,218.50 and 340,920

Step by Step Solution

1. Step 1: Write the proportion equation
   155,218.50 : 340,920 = 340,920 : x
2. Step 2: Convert to fraction form
   155,218.50/340,920 = 340,920/x
3. Step 3: Cross multiply
   155,218.50x = 340,920 × 340,920
4. Step 4: Simplify right side
   155,218.50x = 116,226,446,400
5. Step 5: Solve for x
   x = 116,226,446,400/155,218.50
6. Step 6: Final answer
   x = 748,792.49