Finding the Third Proportional to 355,320 and 777,060

Step by Step Solution

1. Step 1: Write the proportion equation
   355,320 : 777,060 = 777,060 : x
2. Step 2: Convert to fraction form
   355,320/777,060 = 777,060/x
3. Step 3: Cross multiply
   355,320x = 777,060 × 777,060
4. Step 4: Simplify right side
   355,320x = 603,822,243,600
5. Step 5: Solve for x
   x = 603,822,243,600/355,320
6. Step 6: Final answer
   x = 1,699,375.90