Finding the Fourth Proportional to 11,057.37, 16,564.18 and 5,196.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,057.37 : 16,564.18 = 5,196.21 : x
2. Step 2: Convert to fraction form
   11,057.37/16,564.18 = 5,196.21/x
3. Step 3: Cross multiply
   11,057.37x = 16,564.18 × 5,196.21
4. Step 4: Simplify right side
   11,057.37x = 86,070,957.76
5. Step 5: Solve for x
   x = 86,070,957.76/11,057.37
6. Step 6: Final answer
   x = 7,784.04