Finding the Fourth Proportional to 2,618.23, 3,928.43 and 1,059.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.23 : 3,928.43 = 1,059.34 : x
2. Step 2: Convert to fraction form
   2,618.23/3,928.43 = 1,059.34/x
3. Step 3: Cross multiply
   2,618.23x = 3,928.43 × 1,059.34
4. Step 4: Simplify right side
   2,618.23x = 4,161,543.04
5. Step 5: Solve for x
   x = 4,161,543.04/2,618.23
6. Step 6: Final answer
   x = 1,589.45