Finding the Third Proportional to 158,133 and 251,499

Step by Step Solution

1. Step 1: Write the proportion equation
   158,133 : 251,499 = 251,499 : x
2. Step 2: Convert to fraction form
   158,133/251,499 = 251,499/x
3. Step 3: Cross multiply
   158,133x = 251,499 × 251,499
4. Step 4: Simplify right side
   158,133x = 63,251,747,001
5. Step 5: Solve for x
   x = 63,251,747,001/158,133
6. Step 6: Final answer
   x = 399,990.81