Finding the Fourth Proportional to 2,111.96, 2,913.40 and 1,315.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.96 : 2,913.40 = 1,315.16 : x
2. Step 2: Convert to fraction form
   2,111.96/2,913.40 = 1,315.16/x
3. Step 3: Cross multiply
   2,111.96x = 2,913.40 × 1,315.16
4. Step 4: Simplify right side
   2,111.96x = 3,831,574.22
5. Step 5: Solve for x
   x = 3,831,574.22/2,111.96
6. Step 6: Final answer
   x = 1,814.23