Finding the Third Proportional to 199,639 and 432,499

Step by Step Solution

1. Step 1: Write the proportion equation
   199,639 : 432,499 = 432,499 : x
2. Step 2: Convert to fraction form
   199,639/432,499 = 432,499/x
3. Step 3: Cross multiply
   199,639x = 432,499 × 432,499
4. Step 4: Simplify right side
   199,639x = 187,055,385,001
5. Step 5: Solve for x
   x = 187,055,385,001/199,639
6. Step 6: Final answer
   x = 936,968.15