Finding the Fourth Proportional to 72,144.96, 99,558.14 and 40,314.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,144.96 : 99,558.14 = 40,314.12 : x
2. Step 2: Convert to fraction form
   72,144.96/99,558.14 = 40,314.12/x
3. Step 3: Cross multiply
   72,144.96x = 99,558.14 × 40,314.12
4. Step 4: Simplify right side
   72,144.96x = 4,013,598,601.37
5. Step 5: Solve for x
   x = 4,013,598,601.37/72,144.96
6. Step 6: Final answer
   x = 55,632.42