Finding the Fourth Proportional to 1,445.28, 2,157.46 and 1,270.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.28 : 2,157.46 = 1,270.12 : x
2. Step 2: Convert to fraction form
   1,445.28/2,157.46 = 1,270.12/x
3. Step 3: Cross multiply
   1,445.28x = 2,157.46 × 1,270.12
4. Step 4: Simplify right side
   1,445.28x = 2,740,235.72
5. Step 5: Solve for x
   x = 2,740,235.72/1,445.28
6. Step 6: Final answer
   x = 1,895.99