Finding the Fourth Proportional to 2,126.82, 3,189.42 and 810.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,126.82 : 3,189.42 = 810.03 : x
2. Step 2: Convert to fraction form
   2,126.82/3,189.42 = 810.03/x
3. Step 3: Cross multiply
   2,126.82x = 3,189.42 × 810.03
4. Step 4: Simplify right side
   2,126.82x = 2,583,525.88
5. Step 5: Solve for x
   x = 2,583,525.88/2,126.82
6. Step 6: Final answer
   x = 1,214.74