Finding the Fourth Proportional to 2,485.20, 3,429.42 and 1,366.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.20 : 3,429.42 = 1,366.12 : x
2. Step 2: Convert to fraction form
   2,485.20/3,429.42 = 1,366.12/x
3. Step 3: Cross multiply
   2,485.20x = 3,429.42 × 1,366.12
4. Step 4: Simplify right side
   2,485.20x = 4,684,999.25
5. Step 5: Solve for x
   x = 4,684,999.25/2,485.20
6. Step 6: Final answer
   x = 1,885.16