Finding the Fourth Proportional to 105,723.72, 158,673.06 and 79,343.64

Step by Step Solution

1. Step 1: Write the proportion equation
   105,723.72 : 158,673.06 = 79,343.64 : x
2. Step 2: Convert to fraction form
   105,723.72/158,673.06 = 79,343.64/x
3. Step 3: Cross multiply
   105,723.72x = 158,673.06 × 79,343.64
4. Step 4: Simplify right side
   105,723.72x = 12,589,698,150.34
5. Step 5: Solve for x
   x = 12,589,698,150.34/105,723.72
6. Step 6: Final answer
   x = 119,081.11