Finding the Fourth Proportional to 1,818.35, 2,509.71 and 1,072.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.35 : 2,509.71 = 1,072.03 : x
2. Step 2: Convert to fraction form
   1,818.35/2,509.71 = 1,072.03/x
3. Step 3: Cross multiply
   1,818.35x = 2,509.71 × 1,072.03
4. Step 4: Simplify right side
   1,818.35x = 2,690,484.41
5. Step 5: Solve for x
   x = 2,690,484.41/1,818.35
6. Step 6: Final answer
   x = 1,479.63