Finding the Fourth Proportional to 1,339.89, 1,847.55 and 841.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.89 : 1,847.55 = 841.92 : x
2. Step 2: Convert to fraction form
   1,339.89/1,847.55 = 841.92/x
3. Step 3: Cross multiply
   1,339.89x = 1,847.55 × 841.92
4. Step 4: Simplify right side
   1,339.89x = 1,555,489.30
5. Step 5: Solve for x
   x = 1,555,489.30/1,339.89
6. Step 6: Final answer
   x = 1,160.91