Finding the Fourth Proportional to 8,721.33, 12,035.56 and 4,742.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,721.33 : 12,035.56 = 4,742.45 : x
2. Step 2: Convert to fraction form
   8,721.33/12,035.56 = 4,742.45/x
3. Step 3: Cross multiply
   8,721.33x = 12,035.56 × 4,742.45
4. Step 4: Simplify right side
   8,721.33x = 57,078,041.52
5. Step 5: Solve for x
   x = 57,078,041.52/8,721.33
6. Step 6: Final answer
   x = 6,544.65