Finding the Fourth Proportional to 263,351.69, 363,422.72 and 142,490.31

Step by Step Solution

1. Step 1: Write the proportion equation
   263,351.69 : 363,422.72 = 142,490.31 : x
2. Step 2: Convert to fraction form
   263,351.69/363,422.72 = 142,490.31/x
3. Step 3: Cross multiply
   263,351.69x = 363,422.72 × 142,490.31
4. Step 4: Simplify right side
   263,351.69x = 51,784,215,321.39
5. Step 5: Solve for x
   x = 51,784,215,321.39/263,351.69
6. Step 6: Final answer
   x = 196,635.22