Finding the Fourth Proportional to 9,919.17, 13,688.52 and 5,443.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.17 : 13,688.52 = 5,443.35 : x
2. Step 2: Convert to fraction form
   9,919.17/13,688.52 = 5,443.35/x
3. Step 3: Cross multiply
   9,919.17x = 13,688.52 × 5,443.35
4. Step 4: Simplify right side
   9,919.17x = 74,511,405.34
5. Step 5: Solve for x
   x = 74,511,405.34/9,919.17
6. Step 6: Final answer
   x = 7,511.86