Finding the Fourth Proportional to 31,040.96, 42,851.04 and 19,869.44

Step by Step Solution

1. Step 1: Write the proportion equation
   31,040.96 : 42,851.04 = 19,869.44 : x
2. Step 2: Convert to fraction form
   31,040.96/42,851.04 = 19,869.44/x
3. Step 3: Cross multiply
   31,040.96x = 42,851.04 × 19,869.44
4. Step 4: Simplify right side
   31,040.96x = 851,426,168.22
5. Step 5: Solve for x
   x = 851,426,168.22/31,040.96
6. Step 6: Final answer
   x = 27,429.12