Finding the Fourth Proportional to 790,418.82, 1,185,816.86 and 257,940.82

Step by Step Solution

1. Step 1: Write the proportion equation
   790,418.82 : 1,185,816.86 = 257,940.82 : x
2. Step 2: Convert to fraction form
   790,418.82/1,185,816.86 = 257,940.82/x
3. Step 3: Cross multiply
   790,418.82x = 1,185,816.86 × 257,940.82
4. Step 4: Simplify right side
   790,418.82x = 305,870,573,238.23
5. Step 5: Solve for x
   x = 305,870,573,238.23/790,418.82
6. Step 6: Final answer
   x = 386,972.79