Finding the Third Proportional to 142,920 and 222,540.75

Step by Step Solution

1. Step 1: Write the proportion equation
   142,920 : 222,540.75 = 222,540.75 : x
2. Step 2: Convert to fraction form
   142,920/222,540.75 = 222,540.75/x
3. Step 3: Cross multiply
   142,920x = 222,540.75 × 222,540.75
4. Step 4: Simplify right side
   142,920x = 49,524,385,410.56
5. Step 5: Solve for x
   x = 49,524,385,410.56/142,920
6. Step 6: Final answer
   x = 346,518.23