Finding the Fourth Proportional to 1,057,859.82, 1,586,778.72 and 259,145.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057,859.82 : 1,586,778.72 = 259,145.52 : x
2. Step 2: Convert to fraction form
   1,057,859.82/1,586,778.72 = 259,145.52/x
3. Step 3: Cross multiply
   1,057,859.82x = 1,586,778.72 × 259,145.52
4. Step 4: Simplify right side
   1,057,859.82x = 411,206,596,519.33
5. Step 5: Solve for x
   x = 411,206,596,519.33/1,057,859.82
6. Step 6: Final answer
   x = 388,715.58