Finding the Fourth Proportional to 1,816.55, 2,506.79 and 1,019.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.55 : 2,506.79 = 1,019.89 : x
2. Step 2: Convert to fraction form
   1,816.55/2,506.79 = 1,019.89/x
3. Step 3: Cross multiply
   1,816.55x = 2,506.79 × 1,019.89
4. Step 4: Simplify right side
   1,816.55x = 2,556,655.74
5. Step 5: Solve for x
   x = 2,556,655.74/1,816.55
6. Step 6: Final answer
   x = 1,407.42