Finding the Fourth Proportional to 320,978.46, 442,950.23 and 177,738.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,978.46 : 442,950.23 = 177,738.50 : x
2. Step 2: Convert to fraction form
   320,978.46/442,950.23 = 177,738.50/x
3. Step 3: Cross multiply
   320,978.46x = 442,950.23 × 177,738.50
4. Step 4: Simplify right side
   320,978.46x = 78,729,309,454.86
5. Step 5: Solve for x
   x = 78,729,309,454.86/320,978.46
6. Step 6: Final answer
   x = 245,279.11