Finding the Fourth Proportional to 187,778.50, 259,134.33 and 108,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   187,778.50 : 259,134.33 = 108,290.50 : x
2. Step 2: Convert to fraction form
   187,778.50/259,134.33 = 108,290.50/x
3. Step 3: Cross multiply
   187,778.50x = 259,134.33 × 108,290.50
4. Step 4: Simplify right side
   187,778.50x = 28,061,786,162.87
5. Step 5: Solve for x
   x = 28,061,786,162.87/187,778.50
6. Step 6: Final answer
   x = 149,440.89