Finding the Fourth Proportional to 11,635.47, 17,321.61 and 11,566.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,635.47 : 17,321.61 = 11,566.28 : x
2. Step 2: Convert to fraction form
   11,635.47/17,321.61 = 11,566.28/x
3. Step 3: Cross multiply
   11,635.47x = 17,321.61 × 11,566.28
4. Step 4: Simplify right side
   11,635.47x = 200,346,591.31
5. Step 5: Solve for x
   x = 200,346,591.31/11,635.47
6. Step 6: Final answer
   x = 17,218.61