Finding the Third Proportional to 42,555 and 90,490

Step by Step Solution

1. Step 1: Write the proportion equation
   42,555 : 90,490 = 90,490 : x
2. Step 2: Convert to fraction form
   42,555/90,490 = 90,490/x
3. Step 3: Cross multiply
   42,555x = 90,490 × 90,490
4. Step 4: Simplify right side
   42,555x = 8,188,440,100
5. Step 5: Solve for x
   x = 8,188,440,100/42,555
6. Step 6: Final answer
   x = 192,420.16