Finding the Fourth Proportional to 17,139.74, 25,707.98 and 5,450.90

Step by Step Solution

1. Step 1: Write the proportion equation
   17,139.74 : 25,707.98 = 5,450.90 : x
2. Step 2: Convert to fraction form
   17,139.74/25,707.98 = 5,450.90/x
3. Step 3: Cross multiply
   17,139.74x = 25,707.98 × 5,450.90
4. Step 4: Simplify right side
   17,139.74x = 140,131,513.27
5. Step 5: Solve for x
   x = 140,131,513.27/17,139.74
6. Step 6: Final answer
   x = 8,175.83