Finding the Third Proportional to 359,790 and 519,789

Step by Step Solution

1. Step 1: Write the proportion equation
   359,790 : 519,789 = 519,789 : x
2. Step 2: Convert to fraction form
   359,790/519,789 = 519,789/x
3. Step 3: Cross multiply
   359,790x = 519,789 × 519,789
4. Step 4: Simplify right side
   359,790x = 270,180,604,521
5. Step 5: Solve for x
   x = 270,180,604,521/359,790
6. Step 6: Final answer
   x = 750,939.73