Finding the Third Proportional to 42,216 and 90,180

Step by Step Solution

1. Step 1: Write the proportion equation
   42,216 : 90,180 = 90,180 : x
2. Step 2: Convert to fraction form
   42,216/90,180 = 90,180/x
3. Step 3: Cross multiply
   42,216x = 90,180 × 90,180
4. Step 4: Simplify right side
   42,216x = 8,132,432,400
5. Step 5: Solve for x
   x = 8,132,432,400/42,216
6. Step 6: Final answer
   x = 192,638.63