Finding the Third Proportional to 391,434.50 and 599,788

Step by Step Solution

1. Step 1: Write the proportion equation
   391,434.50 : 599,788 = 599,788 : x
2. Step 2: Convert to fraction form
   391,434.50/599,788 = 599,788/x
3. Step 3: Cross multiply
   391,434.50x = 599,788 × 599,788
4. Step 4: Simplify right side
   391,434.50x = 359,745,644,944
5. Step 5: Solve for x
   x = 359,745,644,944/391,434.50
6. Step 6: Final answer
   x = 919,044.30