Finding the Fourth Proportional to 3,155.67, 4,728.27 and 1,919.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,155.67 : 4,728.27 = 1,919.34 : x
2. Step 2: Convert to fraction form
   3,155.67/4,728.27 = 1,919.34/x
3. Step 3: Cross multiply
   3,155.67x = 4,728.27 × 1,919.34
4. Step 4: Simplify right side
   3,155.67x = 9,075,164.94
5. Step 5: Solve for x
   x = 9,075,164.94/3,155.67
6. Step 6: Final answer
   x = 2,875.83