Finding the Fourth Proportional to 1,445.98, 2,165.72 and 1,120.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.98 : 2,165.72 = 1,120.36 : x
2. Step 2: Convert to fraction form
   1,445.98/2,165.72 = 1,120.36/x
3. Step 3: Cross multiply
   1,445.98x = 2,165.72 × 1,120.36
4. Step 4: Simplify right side
   1,445.98x = 2,426,375.23
5. Step 5: Solve for x
   x = 2,426,375.23/1,445.98
6. Step 6: Final answer
   x = 1,678.02