Finding the Third Proportional to 146,991 and 220,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   146,991 : 220,081.50 = 220,081.50 : x
2. Step 2: Convert to fraction form
   146,991/220,081.50 = 220,081.50/x
3. Step 3: Cross multiply
   146,991x = 220,081.50 × 220,081.50
4. Step 4: Simplify right side
   146,991x = 48,435,866,642.25
5. Step 5: Solve for x
   x = 48,435,866,642.25/146,991
6. Step 6: Final answer
   x = 329,515.87