Finding the Fourth Proportional to 2,185.32, 3,015.57 and 1,240.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.32 : 3,015.57 = 1,240.86 : x
2. Step 2: Convert to fraction form
   2,185.32/3,015.57 = 1,240.86/x
3. Step 3: Cross multiply
   2,185.32x = 3,015.57 × 1,240.86
4. Step 4: Simplify right side
   2,185.32x = 3,741,900.19
5. Step 5: Solve for x
   x = 3,741,900.19/2,185.32
6. Step 6: Final answer
   x = 1,712.29