Finding the Fourth Proportional to 31,212.69, 43,061.27 and 19,879.17

Step by Step Solution

1. Step 1: Write the proportion equation
   31,212.69 : 43,061.27 = 19,879.17 : x
2. Step 2: Convert to fraction form
   31,212.69/43,061.27 = 19,879.17/x
3. Step 3: Cross multiply
   31,212.69x = 43,061.27 × 19,879.17
4. Step 4: Simplify right side
   31,212.69x = 856,022,207.35
5. Step 5: Solve for x
   x = 856,022,207.35/31,212.69
6. Step 6: Final answer
   x = 27,425.45