Finding the Third Proportional to 20,861.50 and 43,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,861.50 : 43,449.50 = 43,449.50 : x
2. Step 2: Convert to fraction form
   20,861.50/43,449.50 = 43,449.50/x
3. Step 3: Cross multiply
   20,861.50x = 43,449.50 × 43,449.50
4. Step 4: Simplify right side
   20,861.50x = 1,887,859,050.25
5. Step 5: Solve for x
   x = 1,887,859,050.25/20,861.50
6. Step 6: Final answer
   x = 90,494.89