Finding the Fourth Proportional to 72,081.42, 108,124.56 and 19,491.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,081.42 : 108,124.56 = 19,491.36 : x
2. Step 2: Convert to fraction form
   72,081.42/108,124.56 = 19,491.36/x
3. Step 3: Cross multiply
   72,081.42x = 108,124.56 × 19,491.36
4. Step 4: Simplify right side
   72,081.42x = 2,107,494,723.80
5. Step 5: Solve for x
   x = 2,107,494,723.80/72,081.42
6. Step 6: Final answer
   x = 29,237.70