Finding the Fourth Proportional to 72,162.29, 99,584.60 and 39,896.39

Step by Step Solution

1. Step 1: Write the proportion equation
   72,162.29 : 99,584.60 = 39,896.39 : x
2. Step 2: Convert to fraction form
   72,162.29/99,584.60 = 39,896.39/x
3. Step 3: Cross multiply
   72,162.29x = 99,584.60 × 39,896.39
4. Step 4: Simplify right side
   72,162.29x = 3,973,066,089.07
5. Step 5: Solve for x
   x = 3,973,066,089.07/72,162.29
6. Step 6: Final answer
   x = 55,057.37