Finding the Fourth Proportional to 72,392.56, 99,900.48 and 40,561.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,392.56 : 99,900.48 = 40,561.36 : x
2. Step 2: Convert to fraction form
   72,392.56/99,900.48 = 40,561.36/x
3. Step 3: Cross multiply
   72,392.56x = 99,900.48 × 40,561.36
4. Step 4: Simplify right side
   72,392.56x = 4,052,099,333.45
5. Step 5: Solve for x
   x = 4,052,099,333.45/72,392.56
6. Step 6: Final answer
   x = 55,973.97