Finding the Fourth Proportional to 2,185.07, 3,015.47 and 1,240.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.07 : 3,015.47 = 1,240.91 : x
2. Step 2: Convert to fraction form
   2,185.07/3,015.47 = 1,240.91/x
3. Step 3: Cross multiply
   2,185.07x = 3,015.47 × 1,240.91
4. Step 4: Simplify right side
   2,185.07x = 3,741,914.90
5. Step 5: Solve for x
   x = 3,741,914.90/2,185.07
6. Step 6: Final answer
   x = 1,712.49