Finding the Fourth Proportional to 16,986.47, 25,483.34 and 7,120.06

Step by Step Solution

1. Step 1: Write the proportion equation
   16,986.47 : 25,483.34 = 7,120.06 : x
2. Step 2: Convert to fraction form
   16,986.47/25,483.34 = 7,120.06/x
3. Step 3: Cross multiply
   16,986.47x = 25,483.34 × 7,120.06
4. Step 4: Simplify right side
   16,986.47x = 181,442,863.89
5. Step 5: Solve for x
   x = 181,442,863.89/16,986.47
6. Step 6: Final answer
   x = 10,681.61