Finding the Fourth Proportional to 25,488.56, 38,238.16 and 12,845.42

Step by Step Solution

1. Step 1: Write the proportion equation
   25,488.56 : 38,238.16 = 12,845.42 : x
2. Step 2: Convert to fraction form
   25,488.56/38,238.16 = 12,845.42/x
3. Step 3: Cross multiply
   25,488.56x = 38,238.16 × 12,845.42
4. Step 4: Simplify right side
   25,488.56x = 491,185,225.23
5. Step 5: Solve for x
   x = 491,185,225.23/25,488.56
6. Step 6: Final answer
   x = 19,270.81