Finding the Fourth Proportional to 31,357.50, 47,055.69 and 18,216.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,357.50 : 47,055.69 = 18,216.06 : x
2. Step 2: Convert to fraction form
   31,357.50/47,055.69 = 18,216.06/x
3. Step 3: Cross multiply
   31,357.50x = 47,055.69 × 18,216.06
4. Step 4: Simplify right side
   31,357.50x = 857,169,272.38
5. Step 5: Solve for x
   x = 857,169,272.38/31,357.50
6. Step 6: Final answer
   x = 27,335.38