Finding the Fourth Proportional to 2,026.94, 3,040.72 and 640.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,026.94 : 3,040.72 = 640.01 : x
2. Step 2: Convert to fraction form
   2,026.94/3,040.72 = 640.01/x
3. Step 3: Cross multiply
   2,026.94x = 3,040.72 × 640.01
4. Step 4: Simplify right side
   2,026.94x = 1,946,097.21
5. Step 5: Solve for x
   x = 1,946,097.21/2,026.94
6. Step 6: Final answer
   x = 960.12