Finding the Fourth Proportional to 9,919.22, 13,688.50 and 5,443.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.22 : 13,688.50 = 5,443.02 : x
2. Step 2: Convert to fraction form
   9,919.22/13,688.50 = 5,443.02/x
3. Step 3: Cross multiply
   9,919.22x = 13,688.50 × 5,443.02
4. Step 4: Simplify right side
   9,919.22x = 74,506,752.05
5. Step 5: Solve for x
   x = 74,506,752.05/9,919.22
6. Step 6: Final answer
   x = 7,511.36