Finding the Fourth Proportional to 72,019.81, 99,387.35 and 39,754.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72,019.81 : 99,387.35 = 39,754.44 : x
2. Step 2: Convert to fraction form
   72,019.81/99,387.35 = 39,754.44/x
3. Step 3: Cross multiply
   72,019.81x = 99,387.35 × 39,754.44
4. Step 4: Simplify right side
   72,019.81x = 3,951,088,243.56
5. Step 5: Solve for x
   x = 3,951,088,243.56/72,019.81
6. Step 6: Final answer
   x = 54,861.13