Finding the Third Proportional to 355,518 and 777,546.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,518 : 777,546.50 = 777,546.50 : x
2. Step 2: Convert to fraction form
   355,518/777,546.50 = 777,546.50/x
3. Step 3: Cross multiply
   355,518x = 777,546.50 × 777,546.50
4. Step 4: Simplify right side
   355,518x = 604,578,559,662.25
5. Step 5: Solve for x
   x = 604,578,559,662.25/355,518
6. Step 6: Final answer
   x = 1,700,556.82