Finding the Fourth Proportional to 2,660.40, 3,667.56 and 1,914.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.40 : 3,667.56 = 1,914.12 : x
2. Step 2: Convert to fraction form
   2,660.40/3,667.56 = 1,914.12/x
3. Step 3: Cross multiply
   2,660.40x = 3,667.56 × 1,914.12
4. Step 4: Simplify right side
   2,660.40x = 7,020,149.95
5. Step 5: Solve for x
   x = 7,020,149.95/2,660.40
6. Step 6: Final answer
   x = 2,638.76