Finding the Fourth Proportional to 11,116.24, 16,678.40 and 5,196.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,116.24 : 16,678.40 = 5,196.40 : x
2. Step 2: Convert to fraction form
   11,116.24/16,678.40 = 5,196.40/x
3. Step 3: Cross multiply
   11,116.24x = 16,678.40 × 5,196.40
4. Step 4: Simplify right side
   11,116.24x = 86,667,637.76
5. Step 5: Solve for x
   x = 86,667,637.76/11,116.24
6. Step 6: Final answer
   x = 7,796.49