Finding the Third Proportional to 42,490 and 62,231

Step by Step Solution

1. Step 1: Write the proportion equation
   42,490 : 62,231 = 62,231 : x
2. Step 2: Convert to fraction form
   42,490/62,231 = 62,231/x
3. Step 3: Cross multiply
   42,490x = 62,231 × 62,231
4. Step 4: Simplify right side
   42,490x = 3,872,697,361
5. Step 5: Solve for x
   x = 3,872,697,361/42,490
6. Step 6: Final answer
   x = 91,143.74