Finding the Third Proportional to 42,553 and 90,486

Step by Step Solution

1. Step 1: Write the proportion equation
   42,553 : 90,486 = 90,486 : x
2. Step 2: Convert to fraction form
   42,553/90,486 = 90,486/x
3. Step 3: Cross multiply
   42,553x = 90,486 × 90,486
4. Step 4: Simplify right side
   42,553x = 8,187,716,196
5. Step 5: Solve for x
   x = 8,187,716,196/42,553
6. Step 6: Final answer
   x = 192,412.20