Finding the Fourth Proportional to 31,106.83, 42,928.37 and 16,959.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,106.83 : 42,928.37 = 16,959.91 : x
2. Step 2: Convert to fraction form
   31,106.83/42,928.37 = 16,959.91/x
3. Step 3: Cross multiply
   31,106.83x = 42,928.37 × 16,959.91
4. Step 4: Simplify right side
   31,106.83x = 728,061,206.85
5. Step 5: Solve for x
   x = 728,061,206.85/31,106.83
6. Step 6: Final answer
   x = 23,405.19