Finding the Fourth Proportional to 2,187.15, 3,281.69 and 1,146.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.15 : 3,281.69 = 1,146.90 : x
2. Step 2: Convert to fraction form
   2,187.15/3,281.69 = 1,146.90/x
3. Step 3: Cross multiply
   2,187.15x = 3,281.69 × 1,146.90
4. Step 4: Simplify right side
   2,187.15x = 3,763,756.32
5. Step 5: Solve for x
   x = 3,763,756.32/2,187.15
6. Step 6: Final answer
   x = 1,720.85