Finding the Fourth Proportional to 3,688.91, 5,090.69 and 2,196.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.91 : 5,090.69 = 2,196.87 : x
2. Step 2: Convert to fraction form
   3,688.91/5,090.69 = 2,196.87/x
3. Step 3: Cross multiply
   3,688.91x = 5,090.69 × 2,196.87
4. Step 4: Simplify right side
   3,688.91x = 11,183,573.16
5. Step 5: Solve for x
   x = 11,183,573.16/3,688.91
6. Step 6: Final answer
   x = 3,031.68