Finding the Fourth Proportional to 25,786.34, 38,642.99 and 10,980.34

Step by Step Solution

1. Step 1: Write the proportion equation
   25,786.34 : 38,642.99 = 10,980.34 : x
2. Step 2: Convert to fraction form
   25,786.34/38,642.99 = 10,980.34/x
3. Step 3: Cross multiply
   25,786.34x = 38,642.99 × 10,980.34
4. Step 4: Simplify right side
   25,786.34x = 424,313,168.82
5. Step 5: Solve for x
   x = 424,313,168.82/25,786.34
6. Step 6: Final answer
   x = 16,454.96