Finding the Fourth Proportional to 190,785.31, 263,270.55 and 105,895.69

Step by Step Solution

1. Step 1: Write the proportion equation
   190,785.31 : 263,270.55 = 105,895.69 : x
2. Step 2: Convert to fraction form
   190,785.31/263,270.55 = 105,895.69/x
3. Step 3: Cross multiply
   190,785.31x = 263,270.55 × 105,895.69
4. Step 4: Simplify right side
   190,785.31x = 27,879,216,287.86
5. Step 5: Solve for x
   x = 27,879,216,287.86/190,785.31
6. Step 6: Final answer
   x = 146,128.74