Finding the Fourth Proportional to 72,171.20, 108,256.86 and 19,580.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,171.20 : 108,256.86 = 19,580.69 : x
2. Step 2: Convert to fraction form
   72,171.20/108,256.86 = 19,580.69/x
3. Step 3: Cross multiply
   72,171.20x = 108,256.86 × 19,580.69
4. Step 4: Simplify right side
   72,171.20x = 2,119,744,016.03
5. Step 5: Solve for x
   x = 2,119,744,016.03/72,171.20
6. Step 6: Final answer
   x = 29,371.05