Finding the Fourth Proportional to 31,287.77, 43,176.89 and 16,947.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,287.77 : 43,176.89 = 16,947.28 : x
2. Step 2: Convert to fraction form
   31,287.77/43,176.89 = 16,947.28/x
3. Step 3: Cross multiply
   31,287.77x = 43,176.89 × 16,947.28
4. Step 4: Simplify right side
   31,287.77x = 731,730,628.47
5. Step 5: Solve for x
   x = 731,730,628.47/31,287.77
6. Step 6: Final answer
   x = 23,387.12