Finding the Fourth Proportional to 1,503.37, 2,074.69 and 840.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,503.37 : 2,074.69 = 840.23 : x
2. Step 2: Convert to fraction form
   1,503.37/2,074.69 = 840.23/x
3. Step 3: Cross multiply
   1,503.37x = 2,074.69 × 840.23
4. Step 4: Simplify right side
   1,503.37x = 1,743,216.78
5. Step 5: Solve for x
   x = 1,743,216.78/1,503.37
6. Step 6: Final answer
   x = 1,159.54