Finding the Fourth Proportional to 18,488.28, 25,513.76 and 10,104.78

Step by Step Solution

1. Step 1: Write the proportion equation
   18,488.28 : 25,513.76 = 10,104.78 : x
2. Step 2: Convert to fraction form
   18,488.28/25,513.76 = 10,104.78/x
3. Step 3: Cross multiply
   18,488.28x = 25,513.76 × 10,104.78
4. Step 4: Simplify right side
   18,488.28x = 257,810,931.77
5. Step 5: Solve for x
   x = 257,810,931.77/18,488.28
6. Step 6: Final answer
   x = 13,944.56