Finding the Fourth Proportional to 3,628.42, 5,445.76 and 1,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,628.42 : 5,445.76 = 1,438.72 : x
2. Step 2: Convert to fraction form
   3,628.42/5,445.76 = 1,438.72/x
3. Step 3: Cross multiply
   3,628.42x = 5,445.76 × 1,438.72
4. Step 4: Simplify right side
   3,628.42x = 7,834,923.83
5. Step 5: Solve for x
   x = 7,834,923.83/3,628.42
6. Step 6: Final answer
   x = 2,159.32