Finding the Fourth Proportional to 7,528.28, 10,388.59 and 4,170.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,528.28 : 10,388.59 = 4,170.89 : x
2. Step 2: Convert to fraction form
   7,528.28/10,388.59 = 4,170.89/x
3. Step 3: Cross multiply
   7,528.28x = 10,388.59 × 4,170.89
4. Step 4: Simplify right side
   7,528.28x = 43,329,681.69
5. Step 5: Solve for x
   x = 43,329,681.69/7,528.28
6. Step 6: Final answer
   x = 5,755.59