Finding the Fourth Proportional to 17,090.88, 25,639.56 and 5,405.82

Step by Step Solution

1. Step 1: Write the proportion equation
   17,090.88 : 25,639.56 = 5,405.82 : x
2. Step 2: Convert to fraction form
   17,090.88/25,639.56 = 5,405.82/x
3. Step 3: Cross multiply
   17,090.88x = 25,639.56 × 5,405.82
4. Step 4: Simplify right side
   17,090.88x = 138,602,846.24
5. Step 5: Solve for x
   x = 138,602,846.24/17,090.88
6. Step 6: Final answer
   x = 8,109.75