Finding the Fourth Proportional to 11,454.98, 17,172.71 and 5,212.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,454.98 : 17,172.71 = 5,212.80 : x
2. Step 2: Convert to fraction form
   11,454.98/17,172.71 = 5,212.80/x
3. Step 3: Cross multiply
   11,454.98x = 17,172.71 × 5,212.80
4. Step 4: Simplify right side
   11,454.98x = 89,517,896.17
5. Step 5: Solve for x
   x = 89,517,896.17/11,454.98
6. Step 6: Final answer
   x = 7,814.76