Finding the Fourth Proportional to 3,725.82, 5,142.15 and 2,485.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,725.82 : 5,142.15 = 2,485.98 : x
2. Step 2: Convert to fraction form
   3,725.82/5,142.15 = 2,485.98/x
3. Step 3: Cross multiply
   3,725.82x = 5,142.15 × 2,485.98
4. Step 4: Simplify right side
   3,725.82x = 12,783,282.06
5. Step 5: Solve for x
   x = 12,783,282.06/3,725.82
6. Step 6: Final answer
   x = 3,431.00