Finding the Fourth Proportional to 2,636.28, 3,638.04 and 1,457.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.28 : 3,638.04 = 1,457.40 : x
2. Step 2: Convert to fraction form
   2,636.28/3,638.04 = 1,457.40/x
3. Step 3: Cross multiply
   2,636.28x = 3,638.04 × 1,457.40
4. Step 4: Simplify right side
   2,636.28x = 5,302,079.50
5. Step 5: Solve for x
   x = 5,302,079.50/2,636.28
6. Step 6: Final answer
   x = 2,011.20