Finding the Fourth Proportional to 296,238.89, 408,809.45 and 160,272.90

Step by Step Solution

1. Step 1: Write the proportion equation
   296,238.89 : 408,809.45 = 160,272.90 : x
2. Step 2: Convert to fraction form
   296,238.89/408,809.45 = 160,272.90/x
3. Step 3: Cross multiply
   296,238.89x = 408,809.45 × 160,272.90
4. Step 4: Simplify right side
   296,238.89x = 65,521,076,499.59
5. Step 5: Solve for x
   x = 65,521,076,499.59/296,238.89
6. Step 6: Final answer
   x = 221,176.48