Finding the Fourth Proportional to 9,919.52, 13,688.15 and 5,443.26

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.52 : 13,688.15 = 5,443.26 : x
2. Step 2: Convert to fraction form
   9,919.52/13,688.15 = 5,443.26/x
3. Step 3: Cross multiply
   9,919.52x = 13,688.15 × 5,443.26
4. Step 4: Simplify right side
   9,919.52x = 74,508,159.37
5. Step 5: Solve for x
   x = 74,508,159.37/9,919.52
6. Step 6: Final answer
   x = 7,511.27