Finding the Third Proportional to 665,390 and 1,042,442

Step by Step Solution

1. Step 1: Write the proportion equation
   665,390 : 1,042,442 = 1,042,442 : x
2. Step 2: Convert to fraction form
   665,390/1,042,442 = 1,042,442/x
3. Step 3: Cross multiply
   665,390x = 1,042,442 × 1,042,442
4. Step 4: Simplify right side
   665,390x = 1,086,685,323,364
5. Step 5: Solve for x
   x = 1,086,685,323,364/665,390
6. Step 6: Final answer
   x = 1,633,155.48