Finding the Fourth Proportional to 9,805.50, 13,531.59 and 5,329.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,805.50 : 13,531.59 = 5,329.30 : x
2. Step 2: Convert to fraction form
   9,805.50/13,531.59 = 5,329.30/x
3. Step 3: Cross multiply
   9,805.50x = 13,531.59 × 5,329.30
4. Step 4: Simplify right side
   9,805.50x = 72,113,902.59
5. Step 5: Solve for x
   x = 72,113,902.59/9,805.50
6. Step 6: Final answer
   x = 7,354.43