Finding the Fourth Proportional to 1,224.98, 1,690.71 and 804.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224.98 : 1,690.71 = 804.59 : x
2. Step 2: Convert to fraction form
   1,224.98/1,690.71 = 804.59/x
3. Step 3: Cross multiply
   1,224.98x = 1,690.71 × 804.59
4. Step 4: Simplify right side
   1,224.98x = 1,360,328.36
5. Step 5: Solve for x
   x = 1,360,328.36/1,224.98
6. Step 6: Final answer
   x = 1,110.49