Finding the Fourth Proportional to 158,491.72, 218,723.52 and 86,878.54

Step by Step Solution

1. Step 1: Write the proportion equation
   158,491.72 : 218,723.52 = 86,878.54 : x
2. Step 2: Convert to fraction form
   158,491.72/218,723.52 = 86,878.54/x
3. Step 3: Cross multiply
   158,491.72x = 218,723.52 × 86,878.54
4. Step 4: Simplify right side
   158,491.72x = 19,002,380,081.26
5. Step 5: Solve for x
   x = 19,002,380,081.26/158,491.72
6. Step 6: Final answer
   x = 119,895.10