Finding the Fourth Proportional to 389,993.50, 584,916.27 and 190,112.86

Step by Step Solution

1. Step 1: Write the proportion equation
   389,993.50 : 584,916.27 = 190,112.86 : x
2. Step 2: Convert to fraction form
   389,993.50/584,916.27 = 190,112.86/x
3. Step 3: Cross multiply
   389,993.50x = 584,916.27 × 190,112.86
4. Step 4: Simplify right side
   389,993.50x = 111,200,104,950.23
5. Step 5: Solve for x
   x = 111,200,104,950.23/389,993.50
6. Step 6: Final answer
   x = 285,133.23