Finding the Fourth Proportional to 1,445.48, 1,996.10 and 1,288.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.48 : 1,996.10 = 1,288.14 : x
2. Step 2: Convert to fraction form
   1,445.48/1,996.10 = 1,288.14/x
3. Step 3: Cross multiply
   1,445.48x = 1,996.10 × 1,288.14
4. Step 4: Simplify right side
   1,445.48x = 2,571,256.25
5. Step 5: Solve for x
   x = 2,571,256.25/1,445.48
6. Step 6: Final answer
   x = 1,778.83