Finding the Fourth Proportional to 105,838.27, 158,675.90 and 91,778.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,838.27 : 158,675.90 = 91,778.96 : x
2. Step 2: Convert to fraction form
   105,838.27/158,675.90 = 91,778.96/x
3. Step 3: Cross multiply
   105,838.27x = 158,675.90 × 91,778.96
4. Step 4: Simplify right side
   105,838.27x = 14,563,109,016.86
5. Step 5: Solve for x
   x = 14,563,109,016.86/105,838.27
6. Step 6: Final answer
   x = 137,597.76