Finding the Fourth Proportional to 25,743.63, 38,455.72 and 18,667.47

Step by Step Solution

1. Step 1: Write the proportion equation
   25,743.63 : 38,455.72 = 18,667.47 : x
2. Step 2: Convert to fraction form
   25,743.63/38,455.72 = 18,667.47/x
3. Step 3: Cross multiply
   25,743.63x = 38,455.72 × 18,667.47
4. Step 4: Simplify right side
   25,743.63x = 717,870,952.76
5. Step 5: Solve for x
   x = 717,870,952.76/25,743.63
6. Step 6: Final answer
   x = 27,885.38