Finding the Third Proportional to 357,043.50 and 743,679

Step by Step Solution

1. Step 1: Write the proportion equation
   357,043.50 : 743,679 = 743,679 : x
2. Step 2: Convert to fraction form
   357,043.50/743,679 = 743,679/x
3. Step 3: Cross multiply
   357,043.50x = 743,679 × 743,679
4. Step 4: Simplify right side
   357,043.50x = 553,058,455,041
5. Step 5: Solve for x
   x = 553,058,455,041/357,043.50
6. Step 6: Final answer
   x = 1,548,994.60