Finding the Fourth Proportional to 408,869.56, 613,081.86 and 142,558.84

Step by Step Solution

1. Step 1: Write the proportion equation
   408,869.56 : 613,081.86 = 142,558.84 : x
2. Step 2: Convert to fraction form
   408,869.56/613,081.86 = 142,558.84/x
3. Step 3: Cross multiply
   408,869.56x = 613,081.86 × 142,558.84
4. Step 4: Simplify right side
   408,869.56x = 87,400,238,786.64
5. Step 5: Solve for x
   x = 87,400,238,786.64/408,869.56
6. Step 6: Final answer
   x = 213,760.69