Finding the Fourth Proportional to 12,454.36, 17,185.98 and 7,148.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,454.36 : 17,185.98 = 7,148.05 : x
2. Step 2: Convert to fraction form
   12,454.36/17,185.98 = 7,148.05/x
3. Step 3: Cross multiply
   12,454.36x = 17,185.98 × 7,148.05
4. Step 4: Simplify right side
   12,454.36x = 122,846,244.34
5. Step 5: Solve for x
   x = 122,846,244.34/12,454.36
6. Step 6: Final answer
   x = 9,863.71