Finding the Fourth Proportional to 2,356.72, 3,245.34 and 2,305.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,356.72 : 3,245.34 = 2,305.60 : x
2. Step 2: Convert to fraction form
   2,356.72/3,245.34 = 2,305.60/x
3. Step 3: Cross multiply
   2,356.72x = 3,245.34 × 2,305.60
4. Step 4: Simplify right side
   2,356.72x = 7,482,455.90
5. Step 5: Solve for x
   x = 7,482,455.90/2,356.72
6. Step 6: Final answer
   x = 3,174.94