Finding the Fourth Proportional to 31,405.69, 43,340.82 and 17,981.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,405.69 : 43,340.82 = 17,981.26 : x
2. Step 2: Convert to fraction form
   31,405.69/43,340.82 = 17,981.26/x
3. Step 3: Cross multiply
   31,405.69x = 43,340.82 × 17,981.26
4. Step 4: Simplify right side
   31,405.69x = 779,322,478.40
5. Step 5: Solve for x
   x = 779,322,478.40/31,405.69
6. Step 6: Final answer
   x = 24,814.69