Finding the Fourth Proportional to 682,419.17, 1,023,591.78 and 209,105.91

Step by Step Solution

1. Step 1: Write the proportion equation
   682,419.17 : 1,023,591.78 = 209,105.91 : x
2. Step 2: Convert to fraction form
   682,419.17/1,023,591.78 = 209,105.91/x
3. Step 3: Cross multiply
   682,419.17x = 1,023,591.78 × 209,105.91
4. Step 4: Simplify right side
   682,419.17x = 214,039,090,625.42
5. Step 5: Solve for x
   x = 214,039,090,625.42/682,419.17
6. Step 6: Final answer
   x = 313,647.54