Finding the Fourth Proportional to 2,636.57, 3,955.12 and 762.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.57 : 3,955.12 = 762.51 : x
2. Step 2: Convert to fraction form
   2,636.57/3,955.12 = 762.51/x
3. Step 3: Cross multiply
   2,636.57x = 3,955.12 × 762.51
4. Step 4: Simplify right side
   2,636.57x = 3,015,818.55
5. Step 5: Solve for x
   x = 3,015,818.55/2,636.57
6. Step 6: Final answer
   x = 1,143.84