Finding the Fourth Proportional to 191,185.78, 263,839.42 and 105,148.52

Step by Step Solution

1. Step 1: Write the proportion equation
   191,185.78 : 263,839.42 = 105,148.52 : x
2. Step 2: Convert to fraction form
   191,185.78/263,839.42 = 105,148.52/x
3. Step 3: Cross multiply
   191,185.78x = 263,839.42 × 105,148.52
4. Step 4: Simplify right side
   191,185.78x = 27,742,324,530.66
5. Step 5: Solve for x
   x = 27,742,324,530.66/191,185.78
6. Step 6: Final answer
   x = 145,106.63