Finding the Fourth Proportional to 1,059.40, 1,590.18 and 1,054

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.40 : 1,590.18 = 1,054 : x
2. Step 2: Convert to fraction form
   1,059.40/1,590.18 = 1,054/x
3. Step 3: Cross multiply
   1,059.40x = 1,590.18 × 1,054
4. Step 4: Simplify right side
   1,059.40x = 1,676,049.72
5. Step 5: Solve for x
   x = 1,676,049.72/1,059.40
6. Step 6: Final answer
   x = 1,582.07