Finding the Fourth Proportional to 31,051.40, 42,827.81 and 19,711.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,051.40 : 42,827.81 = 19,711.04 : x
2. Step 2: Convert to fraction form
   31,051.40/42,827.81 = 19,711.04/x
3. Step 3: Cross multiply
   31,051.40x = 42,827.81 × 19,711.04
4. Step 4: Simplify right side
   31,051.40x = 844,180,363.33
5. Step 5: Solve for x
   x = 844,180,363.33/31,051.40
6. Step 6: Final answer
   x = 27,186.55