Finding the Fourth Proportional to 2,646.09, 3,966.71 and 913.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.09 : 3,966.71 = 913.50 : x
2. Step 2: Convert to fraction form
   2,646.09/3,966.71 = 913.50/x
3. Step 3: Cross multiply
   2,646.09x = 3,966.71 × 913.50
4. Step 4: Simplify right side
   2,646.09x = 3,623,585.02
5. Step 5: Solve for x
   x = 3,623,585.02/2,646.09
6. Step 6: Final answer
   x = 1,369.41