Finding the Fourth Proportional to 9,771.20, 13,490.38 and 7,528.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,771.20 : 13,490.38 = 7,528.82 : x
2. Step 2: Convert to fraction form
   9,771.20/13,490.38 = 7,528.82/x
3. Step 3: Cross multiply
   9,771.20x = 13,490.38 × 7,528.82
4. Step 4: Simplify right side
   9,771.20x = 101,566,642.75
5. Step 5: Solve for x
   x = 101,566,642.75/9,771.20
6. Step 6: Final answer
   x = 10,394.49