Finding the Fourth Proportional to 158,721.29, 219,041.69 and 87,103.89

Step by Step Solution

1. Step 1: Write the proportion equation
   158,721.29 : 219,041.69 = 87,103.89 : x
2. Step 2: Convert to fraction form
   158,721.29/219,041.69 = 87,103.89/x
3. Step 3: Cross multiply
   158,721.29x = 219,041.69 × 87,103.89
4. Step 4: Simplify right side
   158,721.29x = 19,079,382,835.65
5. Step 5: Solve for x
   x = 19,079,382,835.65/158,721.29
6. Step 6: Final answer
   x = 120,206.83