Finding the Fourth Proportional to 1,458.03, 2,186.23 and 810.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.03 : 2,186.23 = 810.03 : x
2. Step 2: Convert to fraction form
   1,458.03/2,186.23 = 810.03/x
3. Step 3: Cross multiply
   1,458.03x = 2,186.23 × 810.03
4. Step 4: Simplify right side
   1,458.03x = 1,770,911.89
5. Step 5: Solve for x
   x = 1,770,911.89/1,458.03
6. Step 6: Final answer
   x = 1,214.59