Finding the Third Proportional to 105,631.50 and 219,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,631.50 : 219,970.50 = 219,970.50 : x
2. Step 2: Convert to fraction form
   105,631.50/219,970.50 = 219,970.50/x
3. Step 3: Cross multiply
   105,631.50x = 219,970.50 × 219,970.50
4. Step 4: Simplify right side
   105,631.50x = 48,387,020,870.25
5. Step 5: Solve for x
   x = 48,387,020,870.25/105,631.50
6. Step 6: Final answer
   x = 458,073.78