Finding the Fourth Proportional to 72,078, 99,466.56 and 40,247.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,078 : 99,466.56 = 40,247.36 : x
2. Step 2: Convert to fraction form
   72,078/99,466.56 = 40,247.36/x
3. Step 3: Cross multiply
   72,078x = 99,466.56 × 40,247.36
4. Step 4: Simplify right side
   72,078x = 4,003,266,448.28
5. Step 5: Solve for x
   x = 4,003,266,448.28/72,078
6. Step 6: Final answer
   x = 55,540.75