Finding the Fourth Proportional to 2,090.76, 2,885.04 and 1,206.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.76 : 2,885.04 = 1,206.60 : x
2. Step 2: Convert to fraction form
   2,090.76/2,885.04 = 1,206.60/x
3. Step 3: Cross multiply
   2,090.76x = 2,885.04 × 1,206.60
4. Step 4: Simplify right side
   2,090.76x = 3,481,089.26
5. Step 5: Solve for x
   x = 3,481,089.26/2,090.76
6. Step 6: Final answer
   x = 1,664.99