Finding the Fourth Proportional to 31,101.39, 42,919.91 and 16,954.23

Step by Step Solution

1. Step 1: Write the proportion equation
   31,101.39 : 42,919.91 = 16,954.23 : x
2. Step 2: Convert to fraction form
   31,101.39/42,919.91 = 16,954.23/x
3. Step 3: Cross multiply
   31,101.39x = 42,919.91 × 16,954.23
4. Step 4: Simplify right side
   31,101.39x = 727,674,025.72
5. Step 5: Solve for x
   x = 727,674,025.72/31,101.39
6. Step 6: Final answer
   x = 23,396.83