Finding the Fourth Proportional to 2,288.72, 3,157.32 and 1,356.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.72 : 3,157.32 = 1,356.56 : x
2. Step 2: Convert to fraction form
   2,288.72/3,157.32 = 1,356.56/x
3. Step 3: Cross multiply
   2,288.72x = 3,157.32 × 1,356.56
4. Step 4: Simplify right side
   2,288.72x = 4,283,094.02
5. Step 5: Solve for x
   x = 4,283,094.02/2,288.72
6. Step 6: Final answer
   x = 1,871.39