Finding the Fourth Proportional to 2,086.63, 3,130.88 and 1,099.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.63 : 3,130.88 = 1,099.21 : x
2. Step 2: Convert to fraction form
   2,086.63/3,130.88 = 1,099.21/x
3. Step 3: Cross multiply
   2,086.63x = 3,130.88 × 1,099.21
4. Step 4: Simplify right side
   2,086.63x = 3,441,494.60
5. Step 5: Solve for x
   x = 3,441,494.60/2,086.63
6. Step 6: Final answer
   x = 1,649.31