Finding the Fourth Proportional to 191,145.71, 263,786.82 and 105,100.25

Step by Step Solution

1. Step 1: Write the proportion equation
   191,145.71 : 263,786.82 = 105,100.25 : x
2. Step 2: Convert to fraction form
   191,145.71/263,786.82 = 105,100.25/x
3. Step 3: Cross multiply
   191,145.71x = 263,786.82 × 105,100.25
4. Step 4: Simplify right side
   191,145.71x = 27,724,059,409.77
5. Step 5: Solve for x
   x = 27,724,059,409.77/191,145.71
6. Step 6: Final answer
   x = 145,041.49