Finding the Fourth Proportional to 8,355.51, 12,538.41 and 3,425.19

Step by Step Solution

1. Step 1: Write the proportion equation
   8,355.51 : 12,538.41 = 3,425.19 : x
2. Step 2: Convert to fraction form
   8,355.51/12,538.41 = 3,425.19/x
3. Step 3: Cross multiply
   8,355.51x = 12,538.41 × 3,425.19
4. Step 4: Simplify right side
   8,355.51x = 42,946,436.55
5. Step 5: Solve for x
   x = 42,946,436.55/8,355.51
6. Step 6: Final answer
   x = 5,139.89