Finding the Fourth Proportional to 2,657.72, 3,987.12 and 927.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.72 : 3,987.12 = 927.56 : x
2. Step 2: Convert to fraction form
   2,657.72/3,987.12 = 927.56/x
3. Step 3: Cross multiply
   2,657.72x = 3,987.12 × 927.56
4. Step 4: Simplify right side
   2,657.72x = 3,698,293.03
5. Step 5: Solve for x
   x = 3,698,293.03/2,657.72
6. Step 6: Final answer
   x = 1,391.53