Finding the Fourth Proportional to 25,419.42, 38,128.73 and 10,423.35

Step by Step Solution

1. Step 1: Write the proportion equation
   25,419.42 : 38,128.73 = 10,423.35 : x
2. Step 2: Convert to fraction form
   25,419.42/38,128.73 = 10,423.35/x
3. Step 3: Cross multiply
   25,419.42x = 38,128.73 × 10,423.35
4. Step 4: Simplify right side
   25,419.42x = 397,429,045.73
5. Step 5: Solve for x
   x = 397,429,045.73/25,419.42
6. Step 6: Final answer
   x = 15,634.86