Finding the Fourth Proportional to 389,891.31, 584,857.59 and 109,430.43

Step by Step Solution

1. Step 1: Write the proportion equation
   389,891.31 : 584,857.59 = 109,430.43 : x
2. Step 2: Convert to fraction form
   389,891.31/584,857.59 = 109,430.43/x
3. Step 3: Cross multiply
   389,891.31x = 584,857.59 × 109,430.43
4. Step 4: Simplify right side
   389,891.31x = 64,001,217,562.46
5. Step 5: Solve for x
   x = 64,001,217,562.46/389,891.31
6. Step 6: Final answer
   x = 164,151.43