Finding the Fourth Proportional to 2,790.32, 4,185.52 and 1,059.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.32 : 4,185.52 = 1,059.04 : x
2. Step 2: Convert to fraction form
   2,790.32/4,185.52 = 1,059.04/x
3. Step 3: Cross multiply
   2,790.32x = 4,185.52 × 1,059.04
4. Step 4: Simplify right side
   2,790.32x = 4,432,633.10
5. Step 5: Solve for x
   x = 4,432,633.10/2,790.32
6. Step 6: Final answer
   x = 1,588.58