Finding the Third Proportional to 187,364 and 401,499

Step by Step Solution

1. Step 1: Write the proportion equation
   187,364 : 401,499 = 401,499 : x
2. Step 2: Convert to fraction form
   187,364/401,499 = 401,499/x
3. Step 3: Cross multiply
   187,364x = 401,499 × 401,499
4. Step 4: Simplify right side
   187,364x = 161,201,447,001
5. Step 5: Solve for x
   x = 161,201,447,001/187,364
6. Step 6: Final answer
   x = 860,365.10