Finding the Fourth Proportional to 1,370.46, 1,891.59 and 839.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.46 : 1,891.59 = 839.52 : x
2. Step 2: Convert to fraction form
   1,370.46/1,891.59 = 839.52/x
3. Step 3: Cross multiply
   1,370.46x = 1,891.59 × 839.52
4. Step 4: Simplify right side
   1,370.46x = 1,588,027.64
5. Step 5: Solve for x
   x = 1,588,027.64/1,370.46
6. Step 6: Final answer
   x = 1,158.76