Finding the Fourth Proportional to 3,111.69, 4,667.48 and 771.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.69 : 4,667.48 = 771.69 : x
2. Step 2: Convert to fraction form
   3,111.69/4,667.48 = 771.69/x
3. Step 3: Cross multiply
   3,111.69x = 4,667.48 × 771.69
4. Step 4: Simplify right side
   3,111.69x = 3,601,847.64
5. Step 5: Solve for x
   x = 3,601,847.64/3,111.69
6. Step 6: Final answer
   x = 1,157.52