Finding the Fourth Proportional to 5,155.37, 7,114.56 and 2,917.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,155.37 : 7,114.56 = 2,917.20 : x
2. Step 2: Convert to fraction form
   5,155.37/7,114.56 = 2,917.20/x
3. Step 3: Cross multiply
   5,155.37x = 7,114.56 × 2,917.20
4. Step 4: Simplify right side
   5,155.37x = 20,754,594.43
5. Step 5: Solve for x
   x = 20,754,594.43/5,155.37
6. Step 6: Final answer
   x = 4,025.82