Finding the Third Proportional to 20,452.50 and 42,210

Step by Step Solution

1. Step 1: Write the proportion equation
   20,452.50 : 42,210 = 42,210 : x
2. Step 2: Convert to fraction form
   20,452.50/42,210 = 42,210/x
3. Step 3: Cross multiply
   20,452.50x = 42,210 × 42,210
4. Step 4: Simplify right side
   20,452.50x = 1,781,684,100
5. Step 5: Solve for x
   x = 1,781,684,100/20,452.50
6. Step 6: Final answer
   x = 87,113.27