Finding the Fourth Proportional to 31,796.60, 43,870.41 and 19,872.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,796.60 : 43,870.41 = 19,872.05 : x
2. Step 2: Convert to fraction form
   31,796.60/43,870.41 = 19,872.05/x
3. Step 3: Cross multiply
   31,796.60x = 43,870.41 × 19,872.05
4. Step 4: Simplify right side
   31,796.60x = 871,794,761.69
5. Step 5: Solve for x
   x = 871,794,761.69/31,796.60
6. Step 6: Final answer
   x = 27,417.87