Finding the Fourth Proportional to 1,445.16, 1,993.24 and 1,072.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.16 : 1,993.24 = 1,072.14 : x
2. Step 2: Convert to fraction form
   1,445.16/1,993.24 = 1,072.14/x
3. Step 3: Cross multiply
   1,445.16x = 1,993.24 × 1,072.14
4. Step 4: Simplify right side
   1,445.16x = 2,137,032.33
5. Step 5: Solve for x
   x = 2,137,032.33/1,445.16
6. Step 6: Final answer
   x = 1,478.75