Finding the Fourth Proportional to 9,805.53, 13,531.71 and 5,329.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,805.53 : 13,531.71 = 5,329.28 : x
2. Step 2: Convert to fraction form
   9,805.53/13,531.71 = 5,329.28/x
3. Step 3: Cross multiply
   9,805.53x = 13,531.71 × 5,329.28
4. Step 4: Simplify right side
   9,805.53x = 72,114,271.47
5. Step 5: Solve for x
   x = 72,114,271.47/9,805.53
6. Step 6: Final answer
   x = 7,354.45