Finding the Fourth Proportional to 72,428.52, 99,949.60 and 40,162.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,428.52 : 99,949.60 = 40,162.96 : x
2. Step 2: Convert to fraction form
   72,428.52/99,949.60 = 40,162.96/x
3. Step 3: Cross multiply
   72,428.52x = 99,949.60 × 40,162.96
4. Step 4: Simplify right side
   72,428.52x = 4,014,271,786.82
5. Step 5: Solve for x
   x = 4,014,271,786.82/72,428.52
6. Step 6: Final answer
   x = 55,423.91