Finding the Third Proportional to 20,416.50 and 42,898.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,416.50 : 42,898.50 = 42,898.50 : x
2. Step 2: Convert to fraction form
   20,416.50/42,898.50 = 42,898.50/x
3. Step 3: Cross multiply
   20,416.50x = 42,898.50 × 42,898.50
4. Step 4: Simplify right side
   20,416.50x = 1,840,281,302.25
5. Step 5: Solve for x
   x = 1,840,281,302.25/20,416.50
6. Step 6: Final answer
   x = 90,136.96