Finding the Third Proportional to 42,472 and 90,772

Step by Step Solution

1. Step 1: Write the proportion equation
   42,472 : 90,772 = 90,772 : x
2. Step 2: Convert to fraction form
   42,472/90,772 = 90,772/x
3. Step 3: Cross multiply
   42,472x = 90,772 × 90,772
4. Step 4: Simplify right side
   42,472x = 8,239,555,984
5. Step 5: Solve for x
   x = 8,239,555,984/42,472
6. Step 6: Final answer
   x = 193,999.72