Finding the Fourth Proportional to 9,100.94, 12,555.38 and 5,218.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.94 : 12,555.38 = 5,218.28 : x
2. Step 2: Convert to fraction form
   9,100.94/12,555.38 = 5,218.28/x
3. Step 3: Cross multiply
   9,100.94x = 12,555.38 × 5,218.28
4. Step 4: Simplify right side
   9,100.94x = 65,517,488.35
5. Step 5: Solve for x
   x = 65,517,488.35/9,100.94
6. Step 6: Final answer
   x = 7,198.98