Finding the Fourth Proportional to 2,111.45, 3,167.87 and 1,015.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.45 : 3,167.87 = 1,015.67 : x
2. Step 2: Convert to fraction form
   2,111.45/3,167.87 = 1,015.67/x
3. Step 3: Cross multiply
   2,111.45x = 3,167.87 × 1,015.67
4. Step 4: Simplify right side
   2,111.45x = 3,217,513.36
5. Step 5: Solve for x
   x = 3,217,513.36/2,111.45
6. Step 6: Final answer
   x = 1,523.84