Finding the Fourth Proportional to 680,743.72, 1,020,983.82 and 259,919.56

Step by Step Solution

1. Step 1: Write the proportion equation
   680,743.72 : 1,020,983.82 = 259,919.56 : x
2. Step 2: Convert to fraction form
   680,743.72/1,020,983.82 = 259,919.56/x
3. Step 3: Cross multiply
   680,743.72x = 1,020,983.82 × 259,919.56
4. Step 4: Simplify right side
   680,743.72x = 265,373,665,261.52
5. Step 5: Solve for x
   x = 265,373,665,261.52/680,743.72
6. Step 6: Final answer
   x = 389,829.03