Finding the Fourth Proportional to 2,630.04, 3,945.72 and 781.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.04 : 3,945.72 = 781.14 : x
2. Step 2: Convert to fraction form
   2,630.04/3,945.72 = 781.14/x
3. Step 3: Cross multiply
   2,630.04x = 3,945.72 × 781.14
4. Step 4: Simplify right side
   2,630.04x = 3,082,159.72
5. Step 5: Solve for x
   x = 3,082,159.72/2,630.04
6. Step 6: Final answer
   x = 1,171.91