Finding the Third Proportional to 359,542 and 780,200

Step by Step Solution

1. Step 1: Write the proportion equation
   359,542 : 780,200 = 780,200 : x
2. Step 2: Convert to fraction form
   359,542/780,200 = 780,200/x
3. Step 3: Cross multiply
   359,542x = 780,200 × 780,200
4. Step 4: Simplify right side
   359,542x = 608,712,040,000
5. Step 5: Solve for x
   x = 608,712,040,000/359,542
6. Step 6: Final answer
   x = 1,693,020.68