Finding the Fourth Proportional to 31,404.41, 43,340.49 and 17,979.87

Step by Step Solution

1. Step 1: Write the proportion equation
   31,404.41 : 43,340.49 = 17,979.87 : x
2. Step 2: Convert to fraction form
   31,404.41/43,340.49 = 17,979.87/x
3. Step 3: Cross multiply
   31,404.41x = 43,340.49 × 17,979.87
4. Step 4: Simplify right side
   31,404.41x = 779,256,375.94
5. Step 5: Solve for x
   x = 779,256,375.94/31,404.41
6. Step 6: Final answer
   x = 24,813.60