Finding the Fourth Proportional to 384,703.31, 530,910.78 and 231,789.53

Step by Step Solution

1. Step 1: Write the proportion equation
   384,703.31 : 530,910.78 = 231,789.53 : x
2. Step 2: Convert to fraction form
   384,703.31/530,910.78 = 231,789.53/x
3. Step 3: Cross multiply
   384,703.31x = 530,910.78 × 231,789.53
4. Step 4: Simplify right side
   384,703.31x = 123,059,560,168.13
5. Step 5: Solve for x
   x = 123,059,560,168.13/384,703.31
6. Step 6: Final answer
   x = 319,881.73