Finding the Fourth Proportional to 17,090.38, 25,638.81 and 5,405.32

Step by Step Solution

1. Step 1: Write the proportion equation
   17,090.38 : 25,638.81 = 5,405.32 : x
2. Step 2: Convert to fraction form
   17,090.38/25,638.81 = 5,405.32/x
3. Step 3: Cross multiply
   17,090.38x = 25,638.81 × 5,405.32
4. Step 4: Simplify right side
   17,090.38x = 138,585,972.47
5. Step 5: Solve for x
   x = 138,585,972.47/17,090.38
6. Step 6: Final answer
   x = 8,109.00