Finding the Fourth Proportional to 492,979.28, 680,311.86 and 266,624.78

Step by Step Solution

1. Step 1: Write the proportion equation
   492,979.28 : 680,311.86 = 266,624.78 : x
2. Step 2: Convert to fraction form
   492,979.28/680,311.86 = 266,624.78/x
3. Step 3: Cross multiply
   492,979.28x = 680,311.86 × 266,624.78
4. Step 4: Simplify right side
   492,979.28x = 181,388,000,003.89
5. Step 5: Solve for x
   x = 181,388,000,003.89/492,979.28
6. Step 6: Final answer
   x = 367,942.44