Finding the Fourth Proportional to 31,359.16, 43,275.78 and 17,212.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,359.16 : 43,275.78 = 17,212.12 : x
2. Step 2: Convert to fraction form
   31,359.16/43,275.78 = 17,212.12/x
3. Step 3: Cross multiply
   31,359.16x = 43,275.78 × 17,212.12
4. Step 4: Simplify right side
   31,359.16x = 744,867,918.45
5. Step 5: Solve for x
   x = 744,867,918.45/31,359.16
6. Step 6: Final answer
   x = 23,752.80