Finding the Fourth Proportional to 2,115.86, 3,172.44 and 1,018.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.86 : 3,172.44 = 1,018.04 : x
2. Step 2: Convert to fraction form
   2,115.86/3,172.44 = 1,018.04/x
3. Step 3: Cross multiply
   2,115.86x = 3,172.44 × 1,018.04
4. Step 4: Simplify right side
   2,115.86x = 3,229,670.82
5. Step 5: Solve for x
   x = 3,229,670.82/2,115.86
6. Step 6: Final answer
   x = 1,526.41