Finding the Fourth Proportional to 2,210.34, 3,316.39 and 911.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.34 : 3,316.39 = 911.51 : x
2. Step 2: Convert to fraction form
   2,210.34/3,316.39 = 911.51/x
3. Step 3: Cross multiply
   2,210.34x = 3,316.39 × 911.51
4. Step 4: Simplify right side
   2,210.34x = 3,022,903.79
5. Step 5: Solve for x
   x = 3,022,903.79/2,210.34
6. Step 6: Final answer
   x = 1,367.62