Finding the Fourth Proportional to 2,185.81, 3,281.15 and 2,151.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.81 : 3,281.15 = 2,151.79 : x
2. Step 2: Convert to fraction form
   2,185.81/3,281.15 = 2,151.79/x
3. Step 3: Cross multiply
   2,185.81x = 3,281.15 × 2,151.79
4. Step 4: Simplify right side
   2,185.81x = 7,060,345.76
5. Step 5: Solve for x
   x = 7,060,345.76/2,185.81
6. Step 6: Final answer
   x = 3,230.08