Finding the Fourth Proportional to 7,136.52, 9,857.82 and 5,478.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,136.52 : 9,857.82 = 5,478.42 : x
2. Step 2: Convert to fraction form
   7,136.52/9,857.82 = 5,478.42/x
3. Step 3: Cross multiply
   7,136.52x = 9,857.82 × 5,478.42
4. Step 4: Simplify right side
   7,136.52x = 54,005,257.70
5. Step 5: Solve for x
   x = 54,005,257.70/7,136.52
6. Step 6: Final answer
   x = 7,567.45