Finding the Fourth Proportional to 389,980.17, 584,991.18 and 109,519.29

Step by Step Solution

1. Step 1: Write the proportion equation
   389,980.17 : 584,991.18 = 109,519.29 : x
2. Step 2: Convert to fraction form
   389,980.17/584,991.18 = 109,519.29/x
3. Step 3: Cross multiply
   389,980.17x = 584,991.18 × 109,519.29
4. Step 4: Simplify right side
   389,980.17x = 64,067,818,689.86
5. Step 5: Solve for x
   x = 64,067,818,689.86/389,980.17
6. Step 6: Final answer
   x = 164,284.81