Finding the Fourth Proportional to 17,112.21, 25,669.23 and 5,426.34

Step by Step Solution

1. Step 1: Write the proportion equation
   17,112.21 : 25,669.23 = 5,426.34 : x
2. Step 2: Convert to fraction form
   17,112.21/25,669.23 = 5,426.34/x
3. Step 3: Cross multiply
   17,112.21x = 25,669.23 × 5,426.34
4. Step 4: Simplify right side
   17,112.21x = 139,289,969.52
5. Step 5: Solve for x
   x = 139,289,969.52/17,112.21
6. Step 6: Final answer
   x = 8,139.80