Finding the Fourth Proportional to 18,608.31, 25,665.33 and 12,875.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,608.31 : 25,665.33 = 12,875.31 : x
2. Step 2: Convert to fraction form
   18,608.31/25,665.33 = 12,875.31/x
3. Step 3: Cross multiply
   18,608.31x = 25,665.33 × 12,875.31
4. Step 4: Simplify right side
   18,608.31x = 330,449,080.00
5. Step 5: Solve for x
   x = 330,449,080.00/18,608.31
6. Step 6: Final answer
   x = 17,758.15