Finding the Fourth Proportional to 1,818.81, 2,510.91 and 1,224.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.81 : 2,510.91 = 1,224.42 : x
2. Step 2: Convert to fraction form
   1,818.81/2,510.91 = 1,224.42/x
3. Step 3: Cross multiply
   1,818.81x = 2,510.91 × 1,224.42
4. Step 4: Simplify right side
   1,818.81x = 3,074,408.42
5. Step 5: Solve for x
   x = 3,074,408.42/1,818.81
6. Step 6: Final answer
   x = 1,690.35