Finding the Fourth Proportional to 256,005.72, 353,287.98 and 142,826.04

Step by Step Solution

1. Step 1: Write the proportion equation
   256,005.72 : 353,287.98 = 142,826.04 : x
2. Step 2: Convert to fraction form
   256,005.72/353,287.98 = 142,826.04/x
3. Step 3: Cross multiply
   256,005.72x = 353,287.98 × 142,826.04
4. Step 4: Simplify right side
   256,005.72x = 50,458,723,163.00
5. Step 5: Solve for x
   x = 50,458,723,163.00/256,005.72
6. Step 6: Final answer
   x = 197,099.98