Finding the Fourth Proportional to 72,178.65, 99,604.71 and 40,350.51

Step by Step Solution

1. Step 1: Write the proportion equation
   72,178.65 : 99,604.71 = 40,350.51 : x
2. Step 2: Convert to fraction form
   72,178.65/99,604.71 = 40,350.51/x
3. Step 3: Cross multiply
   72,178.65x = 99,604.71 × 40,350.51
4. Step 4: Simplify right side
   72,178.65x = 4,019,100,846.90
5. Step 5: Solve for x
   x = 4,019,100,846.90/72,178.65
6. Step 6: Final answer
   x = 55,682.68