Finding the Fourth Proportional to 72,222.26, 99,667.06 and 40,391.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,222.26 : 99,667.06 = 40,391.16 : x
2. Step 2: Convert to fraction form
   72,222.26/99,667.06 = 40,391.16/x
3. Step 3: Cross multiply
   72,222.26x = 99,667.06 × 40,391.16
4. Step 4: Simplify right side
   72,222.26x = 4,025,667,692.46
5. Step 5: Solve for x
   x = 4,025,667,692.46/72,222.26
6. Step 6: Final answer
   x = 55,739.99