Finding the Third Proportional to 140,440.50 and 305,910

Step by Step Solution

1. Step 1: Write the proportion equation
   140,440.50 : 305,910 = 305,910 : x
2. Step 2: Convert to fraction form
   140,440.50/305,910 = 305,910/x
3. Step 3: Cross multiply
   140,440.50x = 305,910 × 305,910
4. Step 4: Simplify right side
   140,440.50x = 93,580,928,100
5. Step 5: Solve for x
   x = 93,580,928,100/140,440.50
6. Step 6: Final answer
   x = 666,338.61