Finding the Fourth Proportional to 7,200.64, 9,936.87 and 4,216.33

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.64 : 9,936.87 = 4,216.33 : x
2. Step 2: Convert to fraction form
   7,200.64/9,936.87 = 4,216.33/x
3. Step 3: Cross multiply
   7,200.64x = 9,936.87 × 4,216.33
4. Step 4: Simplify right side
   7,200.64x = 41,897,123.09
5. Step 5: Solve for x
   x = 41,897,123.09/7,200.64
6. Step 6: Final answer
   x = 5,818.53