Finding the Fourth Proportional to 3,860.72, 5,791.52 and 1,263.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,860.72 : 5,791.52 = 1,263.12 : x
2. Step 2: Convert to fraction form
   3,860.72/5,791.52 = 1,263.12/x
3. Step 3: Cross multiply
   3,860.72x = 5,791.52 × 1,263.12
4. Step 4: Simplify right side
   3,860.72x = 7,315,384.74
5. Step 5: Solve for x
   x = 7,315,384.74/3,860.72
6. Step 6: Final answer
   x = 1,894.82