Finding the Fourth Proportional to 11,007.58, 16,513.80 and 5,161

Step by Step Solution

1. Step 1: Write the proportion equation
   11,007.58 : 16,513.80 = 5,161 : x
2. Step 2: Convert to fraction form
   11,007.58/16,513.80 = 5,161/x
3. Step 3: Cross multiply
   11,007.58x = 16,513.80 × 5,161
4. Step 4: Simplify right side
   11,007.58x = 85,227,721.80
5. Step 5: Solve for x
   x = 85,227,721.80/11,007.58
6. Step 6: Final answer
   x = 7,742.64