Finding the Third Proportional to 20,430 and 42,925

Step by Step Solution

1. Step 1: Write the proportion equation
   20,430 : 42,925 = 42,925 : x
2. Step 2: Convert to fraction form
   20,430/42,925 = 42,925/x
3. Step 3: Cross multiply
   20,430x = 42,925 × 42,925
4. Step 4: Simplify right side
   20,430x = 1,842,555,625
5. Step 5: Solve for x
   x = 1,842,555,625/20,430
6. Step 6: Final answer
   x = 90,188.72