Finding the Fourth Proportional to 1,503.42, 2,074.76 and 840.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,503.42 : 2,074.76 = 840.34 : x
2. Step 2: Convert to fraction form
   1,503.42/2,074.76 = 840.34/x
3. Step 3: Cross multiply
   1,503.42x = 2,074.76 × 840.34
4. Step 4: Simplify right side
   1,503.42x = 1,743,503.82
5. Step 5: Solve for x
   x = 1,743,503.82/1,503.42
6. Step 6: Final answer
   x = 1,159.69