Finding the Fourth Proportional to 2,111.96, 3,165.88 and 1,015.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.96 : 3,165.88 = 1,015.70 : x
2. Step 2: Convert to fraction form
   2,111.96/3,165.88 = 1,015.70/x
3. Step 3: Cross multiply
   2,111.96x = 3,165.88 × 1,015.70
4. Step 4: Simplify right side
   2,111.96x = 3,215,584.32
5. Step 5: Solve for x
   x = 3,215,584.32/2,111.96
6. Step 6: Final answer
   x = 1,522.56