Finding the Fourth Proportional to 9,805.38, 13,528.42 and 5,555.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,805.38 : 13,528.42 = 5,555.76 : x
2. Step 2: Convert to fraction form
   9,805.38/13,528.42 = 5,555.76/x
3. Step 3: Cross multiply
   9,805.38x = 13,528.42 × 5,555.76
4. Step 4: Simplify right side
   9,805.38x = 75,160,654.70
5. Step 5: Solve for x
   x = 75,160,654.70/9,805.38
6. Step 6: Final answer
   x = 7,665.25