Finding the Fourth Proportional to 320,244.78, 479,978.72 and 235,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,244.78 : 479,978.72 = 235,216.50 : x
2. Step 2: Convert to fraction form
   320,244.78/479,978.72 = 235,216.50/x
3. Step 3: Cross multiply
   320,244.78x = 479,978.72 × 235,216.50
4. Step 4: Simplify right side
   320,244.78x = 112,898,914,592.88
5. Step 5: Solve for x
   x = 112,898,914,592.88/320,244.78
6. Step 6: Final answer
   x = 352,539.44