Finding the Fourth Proportional to 72,039.78, 108,059.71 and 19,449.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72,039.78 : 108,059.71 = 19,449.22 : x
2. Step 2: Convert to fraction form
   72,039.78/108,059.71 = 19,449.22/x
3. Step 3: Cross multiply
   72,039.78x = 108,059.71 × 19,449.22
4. Step 4: Simplify right side
   72,039.78x = 2,101,677,072.93
5. Step 5: Solve for x
   x = 2,101,677,072.93/72,039.78
6. Step 6: Final answer
   x = 29,173.84