Finding the Fourth Proportional to 31,796.29, 43,879.05 and 19,866.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,796.29 : 43,879.05 = 19,866.55 : x
2. Step 2: Convert to fraction form
   31,796.29/43,879.05 = 19,866.55/x
3. Step 3: Cross multiply
   31,796.29x = 43,879.05 × 19,866.55
4. Step 4: Simplify right side
   31,796.29x = 871,725,022.05
5. Step 5: Solve for x
   x = 871,725,022.05/31,796.29
6. Step 6: Final answer
   x = 27,415.94