Finding the Fourth Proportional to 11,451.45, 17,178.89 and 5,211.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,451.45 : 17,178.89 = 5,211.32 : x
2. Step 2: Convert to fraction form
   11,451.45/17,178.89 = 5,211.32/x
3. Step 3: Cross multiply
   11,451.45x = 17,178.89 × 5,211.32
4. Step 4: Simplify right side
   11,451.45x = 89,524,750.19
5. Step 5: Solve for x
   x = 89,524,750.19/11,451.45
6. Step 6: Final answer
   x = 7,817.76