Finding the Fourth Proportional to 8,959.01, 12,361.41 and 5,421.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,959.01 : 12,361.41 = 5,421.47 : x
2. Step 2: Convert to fraction form
   8,959.01/12,361.41 = 5,421.47/x
3. Step 3: Cross multiply
   8,959.01x = 12,361.41 × 5,421.47
4. Step 4: Simplify right side
   8,959.01x = 67,016,951.67
5. Step 5: Solve for x
   x = 67,016,951.67/8,959.01
6. Step 6: Final answer
   x = 7,480.40