Finding the Third Proportional to 20,342.50 and 30,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,342.50 : 30,405.50 = 30,405.50 : x
2. Step 2: Convert to fraction form
   20,342.50/30,405.50 = 30,405.50/x
3. Step 3: Cross multiply
   20,342.50x = 30,405.50 × 30,405.50
4. Step 4: Simplify right side
   20,342.50x = 924,494,430.25
5. Step 5: Solve for x
   x = 924,494,430.25/20,342.50
6. Step 6: Final answer
   x = 45,446.45