Finding the Fourth Proportional to 316,980.69, 437,478.17 and 196,160.89

Step by Step Solution

1. Step 1: Write the proportion equation
   316,980.69 : 437,478.17 = 196,160.89 : x
2. Step 2: Convert to fraction form
   316,980.69/437,478.17 = 196,160.89/x
3. Step 3: Cross multiply
   316,980.69x = 437,478.17 × 196,160.89
4. Step 4: Simplify right side
   316,980.69x = 85,816,105,928.54
5. Step 5: Solve for x
   x = 85,816,105,928.54/316,980.69
6. Step 6: Final answer
   x = 270,729.76