Finding the Fourth Proportional to 3,956.48, 5,899.68 and 3,688.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,956.48 : 5,899.68 = 3,688.40 : x
2. Step 2: Convert to fraction form
   3,956.48/5,899.68 = 3,688.40/x
3. Step 3: Cross multiply
   3,956.48x = 5,899.68 × 3,688.40
4. Step 4: Simplify right side
   3,956.48x = 21,760,379.71
5. Step 5: Solve for x
   x = 21,760,379.71/3,956.48
6. Step 6: Final answer
   x = 5,499.93