Finding the Fourth Proportional to 7,238.81, 9,988.71 and 4,052.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,238.81 : 9,988.71 = 4,052.28 : x
2. Step 2: Convert to fraction form
   7,238.81/9,988.71 = 4,052.28/x
3. Step 3: Cross multiply
   7,238.81x = 9,988.71 × 4,052.28
4. Step 4: Simplify right side
   7,238.81x = 40,477,059.89
5. Step 5: Solve for x
   x = 40,477,059.89/7,238.81
6. Step 6: Final answer
   x = 5,591.67