Finding the Fourth Proportional to 31,880.69, 43,990.71 and 19,131.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,880.69 : 43,990.71 = 19,131.16 : x
2. Step 2: Convert to fraction form
   31,880.69/43,990.71 = 19,131.16/x
3. Step 3: Cross multiply
   31,880.69x = 43,990.71 × 19,131.16
4. Step 4: Simplify right side
   31,880.69x = 841,593,362.91
5. Step 5: Solve for x
   x = 841,593,362.91/31,880.69
6. Step 6: Final answer
   x = 26,398.22