Finding the Fourth Proportional to 810.04, 1,209.89 and 700.69

Step by Step Solution

1. Step 1: Write the proportion equation
   810.04 : 1,209.89 = 700.69 : x
2. Step 2: Convert to fraction form
   810.04/1,209.89 = 700.69/x
3. Step 3: Cross multiply
   810.04x = 1,209.89 × 700.69
4. Step 4: Simplify right side
   810.04x = 847,757.82
5. Step 5: Solve for x
   x = 847,757.82/810.04
6. Step 6: Final answer
   x = 1,046.56