Finding the Third Proportional to 355,802.50 and 777,269

Step by Step Solution

1. Step 1: Write the proportion equation
   355,802.50 : 777,269 = 777,269 : x
2. Step 2: Convert to fraction form
   355,802.50/777,269 = 777,269/x
3. Step 3: Cross multiply
   355,802.50x = 777,269 × 777,269
4. Step 4: Simplify right side
   355,802.50x = 604,147,098,361
5. Step 5: Solve for x
   x = 604,147,098,361/355,802.50
6. Step 6: Final answer
   x = 1,697,984.41