Finding the Fourth Proportional to 7,200.08, 9,942.56 and 5,428.52

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.08 : 9,942.56 = 5,428.52 : x
2. Step 2: Convert to fraction form
   7,200.08/9,942.56 = 5,428.52/x
3. Step 3: Cross multiply
   7,200.08x = 9,942.56 × 5,428.52
4. Step 4: Simplify right side
   7,200.08x = 53,973,385.81
5. Step 5: Solve for x
   x = 53,973,385.81/7,200.08
6. Step 6: Final answer
   x = 7,496.22