Finding the Fourth Proportional to 2,510.89, 3,766.64 and 867.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.89 : 3,766.64 = 867.81 : x
2. Step 2: Convert to fraction form
   2,510.89/3,766.64 = 867.81/x
3. Step 3: Cross multiply
   2,510.89x = 3,766.64 × 867.81
4. Step 4: Simplify right side
   2,510.89x = 3,268,727.86
5. Step 5: Solve for x
   x = 3,268,727.86/2,510.89
6. Step 6: Final answer
   x = 1,301.82