Finding the Fourth Proportional to 31,112.06, 42,934.47 and 16,964.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,112.06 : 42,934.47 = 16,964.60 : x
2. Step 2: Convert to fraction form
   31,112.06/42,934.47 = 16,964.60/x
3. Step 3: Cross multiply
   31,112.06x = 42,934.47 × 16,964.60
4. Step 4: Simplify right side
   31,112.06x = 728,366,109.76
5. Step 5: Solve for x
   x = 728,366,109.76/31,112.06
6. Step 6: Final answer
   x = 23,411.05