Finding the Fourth Proportional to 9,681.12, 13,356.90 and 5,488.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,681.12 : 13,356.90 = 5,488.56 : x
2. Step 2: Convert to fraction form
   9,681.12/13,356.90 = 5,488.56/x
3. Step 3: Cross multiply
   9,681.12x = 13,356.90 × 5,488.56
4. Step 4: Simplify right side
   9,681.12x = 73,310,147.06
5. Step 5: Solve for x
   x = 73,310,147.06/9,681.12
6. Step 6: Final answer
   x = 7,572.49