Finding the Fourth Proportional to 1,111.24, 1,664.70 and 1,019.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.24 : 1,664.70 = 1,019.44 : x
2. Step 2: Convert to fraction form
   1,111.24/1,664.70 = 1,019.44/x
3. Step 3: Cross multiply
   1,111.24x = 1,664.70 × 1,019.44
4. Step 4: Simplify right side
   1,111.24x = 1,697,061.77
5. Step 5: Solve for x
   x = 1,697,061.77/1,111.24
6. Step 6: Final answer
   x = 1,527.18