Finding the Fourth Proportional to 1,503.39, 2,074.71 and 840.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,503.39 : 2,074.71 = 840.28 : x
2. Step 2: Convert to fraction form
   1,503.39/2,074.71 = 840.28/x
3. Step 3: Cross multiply
   1,503.39x = 2,074.71 × 840.28
4. Step 4: Simplify right side
   1,503.39x = 1,743,333.12
5. Step 5: Solve for x
   x = 1,743,333.12/1,503.39
6. Step 6: Final answer
   x = 1,159.61