Finding the Fourth Proportional to 31,655.49, 43,698.03 and 19,724.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,655.49 : 43,698.03 = 19,724.72 : x
2. Step 2: Convert to fraction form
   31,655.49/43,698.03 = 19,724.72/x
3. Step 3: Cross multiply
   31,655.49x = 43,698.03 × 19,724.72
4. Step 4: Simplify right side
   31,655.49x = 861,931,515.55
5. Step 5: Solve for x
   x = 861,931,515.55/31,655.49
6. Step 6: Final answer
   x = 27,228.50