Finding the Fourth Proportional to 3,688.56, 5,531.22 and 1,956.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.56 : 5,531.22 = 1,956.78 : x
2. Step 2: Convert to fraction form
   3,688.56/5,531.22 = 1,956.78/x
3. Step 3: Cross multiply
   3,688.56x = 5,531.22 × 1,956.78
4. Step 4: Simplify right side
   3,688.56x = 10,823,380.67
5. Step 5: Solve for x
   x = 10,823,380.67/3,688.56
6. Step 6: Final answer
   x = 2,934.31