Finding the Fourth Proportional to 11,209.31, 16,791.24 and 5,196.94

Step by Step Solution

1. Step 1: Write the proportion equation
   11,209.31 : 16,791.24 = 5,196.94 : x
2. Step 2: Convert to fraction form
   11,209.31/16,791.24 = 5,196.94/x
3. Step 3: Cross multiply
   11,209.31x = 16,791.24 × 5,196.94
4. Step 4: Simplify right side
   11,209.31x = 87,263,066.81
5. Step 5: Solve for x
   x = 87,263,066.81/11,209.31
6. Step 6: Final answer
   x = 7,784.87