Finding the Fourth Proportional to 3,622.78, 5,434.71 and 1,025.65

Step by Step Solution

1. Step 1: Write the proportion equation
   3,622.78 : 5,434.71 = 1,025.65 : x
2. Step 2: Convert to fraction form
   3,622.78/5,434.71 = 1,025.65/x
3. Step 3: Cross multiply
   3,622.78x = 5,434.71 × 1,025.65
4. Step 4: Simplify right side
   3,622.78x = 5,574,110.31
5. Step 5: Solve for x
   x = 5,574,110.31/3,622.78
6. Step 6: Final answer
   x = 1,538.63