Finding the Fourth Proportional to 1,445.78, 1,996.02 and 1,113.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.78 : 1,996.02 = 1,113.56 : x
2. Step 2: Convert to fraction form
   1,445.78/1,996.02 = 1,113.56/x
3. Step 3: Cross multiply
   1,445.78x = 1,996.02 × 1,113.56
4. Step 4: Simplify right side
   1,445.78x = 2,222,688.03
5. Step 5: Solve for x
   x = 2,222,688.03/1,445.78
6. Step 6: Final answer
   x = 1,537.36