Finding the Fourth Proportional to 11,610.16, 17,406.49 and 5,685.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,610.16 : 17,406.49 = 5,685.21 : x
2. Step 2: Convert to fraction form
   11,610.16/17,406.49 = 5,685.21/x
3. Step 3: Cross multiply
   11,610.16x = 17,406.49 × 5,685.21
4. Step 4: Simplify right side
   11,610.16x = 98,959,551.01
5. Step 5: Solve for x
   x = 98,959,551.01/11,610.16
6. Step 6: Final answer
   x = 8,523.53