Finding the Fourth Proportional to 13,321.92, 19,985.31 and 5,531.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.92 : 19,985.31 = 5,531.34 : x
2. Step 2: Convert to fraction form
   13,321.92/19,985.31 = 5,531.34/x
3. Step 3: Cross multiply
   13,321.92x = 19,985.31 × 5,531.34
4. Step 4: Simplify right side
   13,321.92x = 110,545,544.62
5. Step 5: Solve for x
   x = 110,545,544.62/13,321.92
6. Step 6: Final answer
   x = 8,298.02