Finding the Fourth Proportional to 31,087.64, 42,901.16 and 16,940.58

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.64 : 42,901.16 = 16,940.58 : x
2. Step 2: Convert to fraction form
   31,087.64/42,901.16 = 16,940.58/x
3. Step 3: Cross multiply
   31,087.64x = 42,901.16 × 16,940.58
4. Step 4: Simplify right side
   31,087.64x = 726,770,448.37
5. Step 5: Solve for x
   x = 726,770,448.37/31,087.64
6. Step 6: Final answer
   x = 23,378.12