Finding the Fourth Proportional to 1,123.20, 1,546.56 and 1,059.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.20 : 1,546.56 = 1,059.12 : x
2. Step 2: Convert to fraction form
   1,123.20/1,546.56 = 1,059.12/x
3. Step 3: Cross multiply
   1,123.20x = 1,546.56 × 1,059.12
4. Step 4: Simplify right side
   1,123.20x = 1,637,992.63
5. Step 5: Solve for x
   x = 1,637,992.63/1,123.20
6. Step 6: Final answer
   x = 1,458.33