Finding the Fourth Proportional to 3,425.30, 5,138.24 and 1,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,425.30 : 5,138.24 = 1,085.50 : x
2. Step 2: Convert to fraction form
   3,425.30/5,138.24 = 1,085.50/x
3. Step 3: Cross multiply
   3,425.30x = 5,138.24 × 1,085.50
4. Step 4: Simplify right side
   3,425.30x = 5,577,560.52
5. Step 5: Solve for x
   x = 5,577,560.52/3,425.30
6. Step 6: Final answer
   x = 1,628.34