Finding the Fourth Proportional to 389,992.50, 584,914.77 and 190,111.86

Step by Step Solution

1. Step 1: Write the proportion equation
   389,992.50 : 584,914.77 = 190,111.86 : x
2. Step 2: Convert to fraction form
   389,992.50/584,914.77 = 190,111.86/x
3. Step 3: Cross multiply
   389,992.50x = 584,914.77 × 190,111.86
4. Step 4: Simplify right side
   389,992.50x = 111,199,234,866.17
5. Step 5: Solve for x
   x = 111,199,234,866.17/389,992.50
6. Step 6: Final answer
   x = 285,131.73