Finding the Third Proportional to 359,480 and 550,128

Step by Step Solution

1. Step 1: Write the proportion equation
   359,480 : 550,128 = 550,128 : x
2. Step 2: Convert to fraction form
   359,480/550,128 = 550,128/x
3. Step 3: Cross multiply
   359,480x = 550,128 × 550,128
4. Step 4: Simplify right side
   359,480x = 302,640,816,384
5. Step 5: Solve for x
   x = 302,640,816,384/359,480
6. Step 6: Final answer
   x = 841,884.99