Finding the Fourth Proportional to 9,919.83, 13,688.73 and 5,442.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.83 : 13,688.73 = 5,442.69 : x
2. Step 2: Convert to fraction form
   9,919.83/13,688.73 = 5,442.69/x
3. Step 3: Cross multiply
   9,919.83x = 13,688.73 × 5,442.69
4. Step 4: Simplify right side
   9,919.83x = 74,503,513.88
5. Step 5: Solve for x
   x = 74,503,513.88/9,919.83
6. Step 6: Final answer
   x = 7,510.56