Finding the Fourth Proportional to 105,128.82, 157,608.18 and 71,764.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,128.82 : 157,608.18 = 71,764.92 : x
2. Step 2: Convert to fraction form
   105,128.82/157,608.18 = 71,764.92/x
3. Step 3: Cross multiply
   105,128.82x = 157,608.18 × 71,764.92
4. Step 4: Simplify right side
   105,128.82x = 11,310,738,429.05
5. Step 5: Solve for x
   x = 11,310,738,429.05/105,128.82
6. Step 6: Final answer
   x = 107,589.32