Finding the Fourth Proportional to 105,613.86, 158,421.12 and 26,728.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,613.86 : 158,421.12 = 26,728.05 : x
2. Step 2: Convert to fraction form
   105,613.86/158,421.12 = 26,728.05/x
3. Step 3: Cross multiply
   105,613.86x = 158,421.12 × 26,728.05
4. Step 4: Simplify right side
   105,613.86x = 4,234,287,616.42
5. Step 5: Solve for x
   x = 4,234,287,616.42/105,613.86
6. Step 6: Final answer
   x = 40,092.16