Finding the Fourth Proportional to 31,681.27, 43,729.89 and 18,261.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,681.27 : 43,729.89 = 18,261.50 : x
2. Step 2: Convert to fraction form
   31,681.27/43,729.89 = 18,261.50/x
3. Step 3: Cross multiply
   31,681.27x = 43,729.89 × 18,261.50
4. Step 4: Simplify right side
   31,681.27x = 798,573,201.83
5. Step 5: Solve for x
   x = 798,573,201.83/31,681.27
6. Step 6: Final answer
   x = 25,206.48