Finding the Fourth Proportional to 1,604.68, 2,215.50 and 1,038.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.68 : 2,215.50 = 1,038.49 : x
2. Step 2: Convert to fraction form
   1,604.68/2,215.50 = 1,038.49/x
3. Step 3: Cross multiply
   1,604.68x = 2,215.50 × 1,038.49
4. Step 4: Simplify right side
   1,604.68x = 2,300,774.60
5. Step 5: Solve for x
   x = 2,300,774.60/1,604.68
6. Step 6: Final answer
   x = 1,433.79