Finding the Fourth Proportional to 12,451.12, 18,643.71 and 10,269.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,451.12 : 18,643.71 = 10,269.58 : x
2. Step 2: Convert to fraction form
   12,451.12/18,643.71 = 10,269.58/x
3. Step 3: Cross multiply
   12,451.12x = 18,643.71 × 10,269.58
4. Step 4: Simplify right side
   12,451.12x = 191,463,071.34
5. Step 5: Solve for x
   x = 191,463,071.34/12,451.12
6. Step 6: Final answer
   x = 15,377.18