Finding the Fourth Proportional to 72,011.68, 108,016.24 and 19,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,011.68 : 108,016.24 = 19,426.72 : x
2. Step 2: Convert to fraction form
   72,011.68/108,016.24 = 19,426.72/x
3. Step 3: Cross multiply
   72,011.68x = 108,016.24 × 19,426.72
4. Step 4: Simplify right side
   72,011.68x = 2,098,401,249.93
5. Step 5: Solve for x
   x = 2,098,401,249.93/72,011.68
6. Step 6: Final answer
   x = 29,139.73