Finding the Third Proportional to 42,330 and 90,490

Step by Step Solution

1. Step 1: Write the proportion equation
   42,330 : 90,490 = 90,490 : x
2. Step 2: Convert to fraction form
   42,330/90,490 = 90,490/x
3. Step 3: Cross multiply
   42,330x = 90,490 × 90,490
4. Step 4: Simplify right side
   42,330x = 8,188,440,100
5. Step 5: Solve for x
   x = 8,188,440,100/42,330
6. Step 6: Final answer
   x = 193,442.95