Finding the Third Proportional to 391,845.75 and 551,804

Step by Step Solution

1. Step 1: Write the proportion equation
   391,845.75 : 551,804 = 551,804 : x
2. Step 2: Convert to fraction form
   391,845.75/551,804 = 551,804/x
3. Step 3: Cross multiply
   391,845.75x = 551,804 × 551,804
4. Step 4: Simplify right side
   391,845.75x = 304,487,654,416
5. Step 5: Solve for x
   x = 304,487,654,416/391,845.75
6. Step 6: Final answer
   x = 777,059.99