Finding the Fourth Proportional to 9,919.32, 13,688.10 and 5,939.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919.32 : 13,688.10 = 5,939.52 : x
2. Step 2: Convert to fraction form
   9,919.32/13,688.10 = 5,939.52/x
3. Step 3: Cross multiply
   9,919.32x = 13,688.10 × 5,939.52
4. Step 4: Simplify right side
   9,919.32x = 81,300,743.71
5. Step 5: Solve for x
   x = 81,300,743.71/9,919.32
6. Step 6: Final answer
   x = 8,196.20