Finding the Fourth Proportional to 12,458.32, 18,671.69 and 5,436.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,458.32 : 18,671.69 = 5,436.45 : x
2. Step 2: Convert to fraction form
   12,458.32/18,671.69 = 5,436.45/x
3. Step 3: Cross multiply
   12,458.32x = 18,671.69 × 5,436.45
4. Step 4: Simplify right side
   12,458.32x = 101,507,709.10
5. Step 5: Solve for x
   x = 101,507,709.10/12,458.32
6. Step 6: Final answer
   x = 8,147.79