Finding the Fourth Proportional to 1,485.57, 2,050.73 and 1,045.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.57 : 2,050.73 = 1,045.11 : x
2. Step 2: Convert to fraction form
   1,485.57/2,050.73 = 1,045.11/x
3. Step 3: Cross multiply
   1,485.57x = 2,050.73 × 1,045.11
4. Step 4: Simplify right side
   1,485.57x = 2,143,238.43
5. Step 5: Solve for x
   x = 2,143,238.43/1,485.57
6. Step 6: Final answer
   x = 1,442.70