Finding the Fourth Proportional to 11,321.60, 16,981.76 and 3,530.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,321.60 : 16,981.76 = 3,530.24 : x
2. Step 2: Convert to fraction form
   11,321.60/16,981.76 = 3,530.24/x
3. Step 3: Cross multiply
   11,321.60x = 16,981.76 × 3,530.24
4. Step 4: Simplify right side
   11,321.60x = 59,949,688.42
5. Step 5: Solve for x
   x = 59,949,688.42/11,321.60
6. Step 6: Final answer
   x = 5,295.16