Finding the Fourth Proportional to 11,347.89, 17,037.78 and 5,805.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,347.89 : 17,037.78 = 5,805.21 : x
2. Step 2: Convert to fraction form
   11,347.89/17,037.78 = 5,805.21/x
3. Step 3: Cross multiply
   11,347.89x = 17,037.78 × 5,805.21
4. Step 4: Simplify right side
   11,347.89x = 98,907,890.83
5. Step 5: Solve for x
   x = 98,907,890.83/11,347.89
6. Step 6: Final answer
   x = 8,715.97