Finding the Fourth Proportional to 2,090.88, 2,885.52 and 1,206.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.88 : 2,885.52 = 1,206.96 : x
2. Step 2: Convert to fraction form
   2,090.88/2,885.52 = 1,206.96/x
3. Step 3: Cross multiply
   2,090.88x = 2,885.52 × 1,206.96
4. Step 4: Simplify right side
   2,090.88x = 3,482,707.22
5. Step 5: Solve for x
   x = 3,482,707.22/2,090.88
6. Step 6: Final answer
   x = 1,665.67