Finding the Fourth Proportional to 3,645.63, 5,459.59 and 2,080.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645.63 : 5,459.59 = 2,080.91 : x
2. Step 2: Convert to fraction form
   3,645.63/5,459.59 = 2,080.91/x
3. Step 3: Cross multiply
   3,645.63x = 5,459.59 × 2,080.91
4. Step 4: Simplify right side
   3,645.63x = 11,360,915.43
5. Step 5: Solve for x
   x = 11,360,915.43/3,645.63
6. Step 6: Final answer
   x = 3,116.31