Finding the Fourth Proportional to 3,688.53, 5,090.18 and 2,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.53 : 5,090.18 = 2,196.50 : x
2. Step 2: Convert to fraction form
   3,688.53/5,090.18 = 2,196.50/x
3. Step 3: Cross multiply
   3,688.53x = 5,090.18 × 2,196.50
4. Step 4: Simplify right side
   3,688.53x = 11,180,543.94
5. Step 5: Solve for x
   x = 11,180,543.94/3,688.53
6. Step 6: Final answer
   x = 3,031.17