Finding the Fourth Proportional to 72,142.59, 99,556.57 and 40,311.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72,142.59 : 99,556.57 = 40,311.52 : x
2. Step 2: Convert to fraction form
   72,142.59/99,556.57 = 40,311.52/x
3. Step 3: Cross multiply
   72,142.59x = 99,556.57 × 40,311.52
4. Step 4: Simplify right side
   72,142.59x = 4,013,276,313.02
5. Step 5: Solve for x
   x = 4,013,276,313.02/72,142.59
6. Step 6: Final answer
   x = 55,629.78