Finding the Third Proportional to 42,291 and 90,211

Step by Step Solution

1. Step 1: Write the proportion equation
   42,291 : 90,211 = 90,211 : x
2. Step 2: Convert to fraction form
   42,291/90,211 = 90,211/x
3. Step 3: Cross multiply
   42,291x = 90,211 × 90,211
4. Step 4: Simplify right side
   42,291x = 8,138,024,521
5. Step 5: Solve for x
   x = 8,138,024,521/42,291
6. Step 6: Final answer
   x = 192,429.23