Finding the Fourth Proportional to 31,356.72, 43,272.76 and 17,209.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,356.72 : 43,272.76 = 17,209.36 : x
2. Step 2: Convert to fraction form
   31,356.72/43,272.76 = 17,209.36/x
3. Step 3: Cross multiply
   31,356.72x = 43,272.76 × 17,209.36
4. Step 4: Simplify right side
   31,356.72x = 744,696,505.03
5. Step 5: Solve for x
   x = 744,696,505.03/31,356.72
6. Step 6: Final answer
   x = 23,749.18