Finding the Fourth Proportional to 11,003.72, 16,505.44 and 5,156.19

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.72 : 16,505.44 = 5,156.19 : x
2. Step 2: Convert to fraction form
   11,003.72/16,505.44 = 5,156.19/x
3. Step 3: Cross multiply
   11,003.72x = 16,505.44 × 5,156.19
4. Step 4: Simplify right side
   11,003.72x = 85,105,171.78
5. Step 5: Solve for x
   x = 85,105,171.78/11,003.72
6. Step 6: Final answer
   x = 7,734.22