Finding the Fourth Proportional to 2,564.98, 3,847.61 and 810.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,564.98 : 3,847.61 = 810.03 : x
2. Step 2: Convert to fraction form
   2,564.98/3,847.61 = 810.03/x
3. Step 3: Cross multiply
   2,564.98x = 3,847.61 × 810.03
4. Step 4: Simplify right side
   2,564.98x = 3,116,691.17
5. Step 5: Solve for x
   x = 3,116,691.17/2,564.98
6. Step 6: Final answer
   x = 1,215.10