Finding the Fourth Proportional to 256,329.30, 384,404.91 and 142,650.59

Step by Step Solution

1. Step 1: Write the proportion equation
   256,329.30 : 384,404.91 = 142,650.59 : x
2. Step 2: Convert to fraction form
   256,329.30/384,404.91 = 142,650.59/x
3. Step 3: Cross multiply
   256,329.30x = 384,404.91 × 142,650.59
4. Step 4: Simplify right side
   256,329.30x = 54,835,584,575.12
5. Step 5: Solve for x
   x = 54,835,584,575.12/256,329.30
6. Step 6: Final answer
   x = 213,926.32