Finding the Third Proportional to 401,494 and 591,148

Step by Step Solution

1. Step 1: Write the proportion equation
   401,494 : 591,148 = 591,148 : x
2. Step 2: Convert to fraction form
   401,494/591,148 = 591,148/x
3. Step 3: Cross multiply
   401,494x = 591,148 × 591,148
4. Step 4: Simplify right side
   401,494x = 349,455,957,904
5. Step 5: Solve for x
   x = 349,455,957,904/401,494
6. Step 6: Final answer
   x = 870,388.99