Finding the Fourth Proportional to 12,427.25, 18,653.52 and 5,410.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.25 : 18,653.52 = 5,410.40 : x
2. Step 2: Convert to fraction form
   12,427.25/18,653.52 = 5,410.40/x
3. Step 3: Cross multiply
   12,427.25x = 18,653.52 × 5,410.40
4. Step 4: Simplify right side
   12,427.25x = 100,922,911.34
5. Step 5: Solve for x
   x = 100,922,911.34/12,427.25
6. Step 6: Final answer
   x = 8,121.10