Finding the Fourth Proportional to 2,654.39, 3,980.76 and 1,266.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,654.39 : 3,980.76 = 1,266.99 : x
2. Step 2: Convert to fraction form
   2,654.39/3,980.76 = 1,266.99/x
3. Step 3: Cross multiply
   2,654.39x = 3,980.76 × 1,266.99
4. Step 4: Simplify right side
   2,654.39x = 5,043,583.11
5. Step 5: Solve for x
   x = 5,043,583.11/2,654.39
6. Step 6: Final answer
   x = 1,900.09