Finding the Third Proportional to 401,490.75 and 591,144

Step by Step Solution

1. Step 1: Write the proportion equation
   401,490.75 : 591,144 = 591,144 : x
2. Step 2: Convert to fraction form
   401,490.75/591,144 = 591,144/x
3. Step 3: Cross multiply
   401,490.75x = 591,144 × 591,144
4. Step 4: Simplify right side
   401,490.75x = 349,451,228,736
5. Step 5: Solve for x
   x = 349,451,228,736/401,490.75
6. Step 6: Final answer
   x = 870,384.26