Finding the Fourth Proportional to 3,620.31, 5,429.94 and 1,023.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,620.31 : 5,429.94 = 1,023.45 : x
2. Step 2: Convert to fraction form
   3,620.31/5,429.94 = 1,023.45/x
3. Step 3: Cross multiply
   3,620.31x = 5,429.94 × 1,023.45
4. Step 4: Simplify right side
   3,620.31x = 5,557,272.09
5. Step 5: Solve for x
   x = 5,557,272.09/3,620.31
6. Step 6: Final answer
   x = 1,535.03