Finding the Fourth Proportional to 10,931.09, 16,398.72 and 3,536.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.09 : 16,398.72 = 3,536.60 : x
2. Step 2: Convert to fraction form
   10,931.09/16,398.72 = 3,536.60/x
3. Step 3: Cross multiply
   10,931.09x = 16,398.72 × 3,536.60
4. Step 4: Simplify right side
   10,931.09x = 57,995,631.16
5. Step 5: Solve for x
   x = 57,995,631.16/10,931.09
6. Step 6: Final answer
   x = 5,305.57