Finding the Fourth Proportional to 17,261.49, 25,878.18 and 5,409.18

Step by Step Solution

1. Step 1: Write the proportion equation
   17,261.49 : 25,878.18 = 5,409.18 : x
2. Step 2: Convert to fraction form
   17,261.49/25,878.18 = 5,409.18/x
3. Step 3: Cross multiply
   17,261.49x = 25,878.18 × 5,409.18
4. Step 4: Simplify right side
   17,261.49x = 139,979,733.69
5. Step 5: Solve for x
   x = 139,979,733.69/17,261.49
6. Step 6: Final answer
   x = 8,109.37