Finding the Fourth Proportional to 17,109.30, 25,661.37 and 5,421

Step by Step Solution

1. Step 1: Write the proportion equation
   17,109.30 : 25,661.37 = 5,421 : x
2. Step 2: Convert to fraction form
   17,109.30/25,661.37 = 5,421/x
3. Step 3: Cross multiply
   17,109.30x = 25,661.37 × 5,421
4. Step 4: Simplify right side
   17,109.30x = 139,110,286.77
5. Step 5: Solve for x
   x = 139,110,286.77/17,109.30
6. Step 6: Final answer
   x = 8,130.68