Finding the Fourth Proportional to 389,885.31, 584,848.59 and 109,424.43

Step by Step Solution

1. Step 1: Write the proportion equation
   389,885.31 : 584,848.59 = 109,424.43 : x
2. Step 2: Convert to fraction form
   389,885.31/584,848.59 = 109,424.43/x
3. Step 3: Cross multiply
   389,885.31x = 584,848.59 × 109,424.43
4. Step 4: Simplify right side
   389,885.31x = 63,996,723,597.05
5. Step 5: Solve for x
   x = 63,996,723,597.05/389,885.31
6. Step 6: Final answer
   x = 164,142.43