Finding the Fourth Proportional to 389,983.78, 584,901.69 and 190,103.14

Step by Step Solution

1. Step 1: Write the proportion equation
   389,983.78 : 584,901.69 = 190,103.14 : x
2. Step 2: Convert to fraction form
   389,983.78/584,901.69 = 190,103.14/x
3. Step 3: Cross multiply
   389,983.78x = 584,901.69 × 190,103.14
4. Step 4: Simplify right side
   389,983.78x = 111,191,648,947.88
5. Step 5: Solve for x
   x = 111,191,648,947.88/389,983.78
6. Step 6: Final answer
   x = 285,118.65