Finding the Third Proportional to 428,340 and 601,686

Step by Step Solution

1. Step 1: Write the proportion equation
   428,340 : 601,686 = 601,686 : x
2. Step 2: Convert to fraction form
   428,340/601,686 = 601,686/x
3. Step 3: Cross multiply
   428,340x = 601,686 × 601,686
4. Step 4: Simplify right side
   428,340x = 362,026,042,596
5. Step 5: Solve for x
   x = 362,026,042,596/428,340
6. Step 6: Final answer
   x = 845,183.83