Finding the Fourth Proportional to 11,399.57, 17,106.97 and 4,385.37

Step by Step Solution

1. Step 1: Write the proportion equation
   11,399.57 : 17,106.97 = 4,385.37 : x
2. Step 2: Convert to fraction form
   11,399.57/17,106.97 = 4,385.37/x
3. Step 3: Cross multiply
   11,399.57x = 17,106.97 × 4,385.37
4. Step 4: Simplify right side
   11,399.57x = 75,020,393.03
5. Step 5: Solve for x
   x = 75,020,393.03/11,399.57
6. Step 6: Final answer
   x = 6,580.99