Finding the Fourth Proportional to 9,776.62, 13,491.57 and 5,527.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,776.62 : 13,491.57 = 5,527.61 : x
2. Step 2: Convert to fraction form
   9,776.62/13,491.57 = 5,527.61/x
3. Step 3: Cross multiply
   9,776.62x = 13,491.57 × 5,527.61
4. Step 4: Simplify right side
   9,776.62x = 74,576,137.25
5. Step 5: Solve for x
   x = 74,576,137.25/9,776.62
6. Step 6: Final answer
   x = 7,628.01