Finding the Fourth Proportional to 2,885.60, 3,980.89 and 1,766.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,885.60 : 3,980.89 = 1,766.18 : x
2. Step 2: Convert to fraction form
   2,885.60/3,980.89 = 1,766.18/x
3. Step 3: Cross multiply
   2,885.60x = 3,980.89 × 1,766.18
4. Step 4: Simplify right side
   2,885.60x = 7,030,968.30
5. Step 5: Solve for x
   x = 7,030,968.30/2,885.60
6. Step 6: Final answer
   x = 2,436.57