Finding the Fourth Proportional to 190,619.69, 263,086.67 and 105,764.09

Step by Step Solution

1. Step 1: Write the proportion equation
   190,619.69 : 263,086.67 = 105,764.09 : x
2. Step 2: Convert to fraction form
   190,619.69/263,086.67 = 105,764.09/x
3. Step 3: Cross multiply
   190,619.69x = 263,086.67 × 105,764.09
4. Step 4: Simplify right side
   190,619.69x = 27,825,121,714.86
5. Step 5: Solve for x
   x = 27,825,121,714.86/190,619.69
6. Step 6: Final answer
   x = 145,971.92