Finding the Fourth Proportional to 2,019.45, 3,030.21 and 1,045.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.45 : 3,030.21 = 1,045.35 : x
2. Step 2: Convert to fraction form
   2,019.45/3,030.21 = 1,045.35/x
3. Step 3: Cross multiply
   2,019.45x = 3,030.21 × 1,045.35
4. Step 4: Simplify right side
   2,019.45x = 3,167,630.02
5. Step 5: Solve for x
   x = 3,167,630.02/2,019.45
6. Step 6: Final answer
   x = 1,568.56