Finding the Fourth Proportional to 3,681.54, 5,075.33 and 2,631.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.54 : 5,075.33 = 2,631.78 : x
2. Step 2: Convert to fraction form
   3,681.54/5,075.33 = 2,631.78/x
3. Step 3: Cross multiply
   3,681.54x = 5,075.33 × 2,631.78
4. Step 4: Simplify right side
   3,681.54x = 13,357,138.83
5. Step 5: Solve for x
   x = 13,357,138.83/3,681.54
6. Step 6: Final answer
   x = 3,628.14