Finding the Third Proportional to 42,357 and 90,531

Step by Step Solution

1. Step 1: Write the proportion equation
   42,357 : 90,531 = 90,531 : x
2. Step 2: Convert to fraction form
   42,357/90,531 = 90,531/x
3. Step 3: Cross multiply
   42,357x = 90,531 × 90,531
4. Step 4: Simplify right side
   42,357x = 8,195,861,961
5. Step 5: Solve for x
   x = 8,195,861,961/42,357
6. Step 6: Final answer
   x = 193,494.86