Finding the Fourth Proportional to 256,914.29, 384,872.71 and 189,323.63

Step by Step Solution

1. Step 1: Write the proportion equation
   256,914.29 : 384,872.71 = 189,323.63 : x
2. Step 2: Convert to fraction form
   256,914.29/384,872.71 = 189,323.63/x
3. Step 3: Cross multiply
   256,914.29x = 384,872.71 × 189,323.63
4. Step 4: Simplify right side
   256,914.29x = 72,865,496,147.46
5. Step 5: Solve for x
   x = 72,865,496,147.46/256,914.29
6. Step 6: Final answer
   x = 283,617.92