Finding the Fourth Proportional to 3,079.50, 4,620.15 and 1,131.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,079.50 : 4,620.15 = 1,131.72 : x
2. Step 2: Convert to fraction form
   3,079.50/4,620.15 = 1,131.72/x
3. Step 3: Cross multiply
   3,079.50x = 4,620.15 × 1,131.72
4. Step 4: Simplify right side
   3,079.50x = 5,228,716.16
5. Step 5: Solve for x
   x = 5,228,716.16/3,079.50
6. Step 6: Final answer
   x = 1,697.91