Finding the Fourth Proportional to 31,078.73, 42,889.14 and 16,931.58

Step by Step Solution

1. Step 1: Write the proportion equation
   31,078.73 : 42,889.14 = 16,931.58 : x
2. Step 2: Convert to fraction form
   31,078.73/42,889.14 = 16,931.58/x
3. Step 3: Cross multiply
   31,078.73x = 42,889.14 × 16,931.58
4. Step 4: Simplify right side
   31,078.73x = 726,180,905.04
5. Step 5: Solve for x
   x = 726,180,905.04/31,078.73
6. Step 6: Final answer
   x = 23,365.85