Finding the Fourth Proportional to 1,503.30, 2,074.57 and 840.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,503.30 : 2,074.57 = 840.18 : x
2. Step 2: Convert to fraction form
   1,503.30/2,074.57 = 840.18/x
3. Step 3: Cross multiply
   1,503.30x = 2,074.57 × 840.18
4. Step 4: Simplify right side
   1,503.30x = 1,743,017.90
5. Step 5: Solve for x
   x = 1,743,017.90/1,503.30
6. Step 6: Final answer
   x = 1,159.46