Finding the Fourth Proportional to 2,630.53, 3,944.42 and 781.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.53 : 3,944.42 = 781.39 : x
2. Step 2: Convert to fraction form
   2,630.53/3,944.42 = 781.39/x
3. Step 3: Cross multiply
   2,630.53x = 3,944.42 × 781.39
4. Step 4: Simplify right side
   2,630.53x = 3,082,130.34
5. Step 5: Solve for x
   x = 3,082,130.34/2,630.53
6. Step 6: Final answer
   x = 1,171.68