Finding the Fourth Proportional to 2,018.80, 3,030.12 and 1,045.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.80 : 3,030.12 = 1,045.60 : x
2. Step 2: Convert to fraction form
   2,018.80/3,030.12 = 1,045.60/x
3. Step 3: Cross multiply
   2,018.80x = 3,030.12 × 1,045.60
4. Step 4: Simplify right side
   2,018.80x = 3,168,293.47
5. Step 5: Solve for x
   x = 3,168,293.47/2,018.80
6. Step 6: Final answer
   x = 1,569.39