Finding the Fourth Proportional to 3,688.47, 5,090.09 and 2,196.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.47 : 5,090.09 = 2,196.45 : x
2. Step 2: Convert to fraction form
   3,688.47/5,090.09 = 2,196.45/x
3. Step 3: Cross multiply
   3,688.47x = 5,090.09 × 2,196.45
4. Step 4: Simplify right side
   3,688.47x = 11,180,151.03
5. Step 5: Solve for x
   x = 11,180,151.03/3,688.47
6. Step 6: Final answer
   x = 3,031.10