Finding the Fourth Proportional to 72,371.97, 108,561.02 and 19,781.33

Step by Step Solution

1. Step 1: Write the proportion equation
   72,371.97 : 108,561.02 = 19,781.33 : x
2. Step 2: Convert to fraction form
   72,371.97/108,561.02 = 19,781.33/x
3. Step 3: Cross multiply
   72,371.97x = 108,561.02 × 19,781.33
4. Step 4: Simplify right side
   72,371.97x = 2,147,480,720.04
5. Step 5: Solve for x
   x = 2,147,480,720.04/72,371.97
6. Step 6: Final answer
   x = 29,672.82