Finding the Fourth Proportional to 263,002.10, 394,494.51 and 105,188.18

Step by Step Solution

1. Step 1: Write the proportion equation
   263,002.10 : 394,494.51 = 105,188.18 : x
2. Step 2: Convert to fraction form
   263,002.10/394,494.51 = 105,188.18/x
3. Step 3: Cross multiply
   263,002.10x = 394,494.51 × 105,188.18
4. Step 4: Simplify right side
   263,002.10x = 41,496,159,526.89
5. Step 5: Solve for x
   x = 41,496,159,526.89/263,002.10
6. Step 6: Final answer
   x = 157,778.81