Finding the Fourth Proportional to 31,259.71, 43,138.74 and 17,112.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,259.71 : 43,138.74 = 17,112.25 : x
2. Step 2: Convert to fraction form
   31,259.71/43,138.74 = 17,112.25/x
3. Step 3: Cross multiply
   31,259.71x = 43,138.74 × 17,112.25
4. Step 4: Simplify right side
   31,259.71x = 738,200,903.57
5. Step 5: Solve for x
   x = 738,200,903.57/31,259.71
6. Step 6: Final answer
   x = 23,615.09