Finding the Fourth Proportional to 20,141.69, 30,080.81 and 17,148.21

Step by Step Solution

1. Step 1: Write the proportion equation
   20,141.69 : 30,080.81 = 17,148.21 : x
2. Step 2: Convert to fraction form
   20,141.69/30,080.81 = 17,148.21/x
3. Step 3: Cross multiply
   20,141.69x = 30,080.81 × 17,148.21
4. Step 4: Simplify right side
   20,141.69x = 515,831,961.11
5. Step 5: Solve for x
   x = 515,831,961.11/20,141.69
6. Step 6: Final answer
   x = 25,610.17