Finding the Fourth Proportional to 1,520.85, 2,098.79 and 839.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.85 : 2,098.79 = 839.51 : x
2. Step 2: Convert to fraction form
   1,520.85/2,098.79 = 839.51/x
3. Step 3: Cross multiply
   1,520.85x = 2,098.79 × 839.51
4. Step 4: Simplify right side
   1,520.85x = 1,761,940.50
5. Step 5: Solve for x
   x = 1,761,940.50/1,520.85
6. Step 6: Final answer
   x = 1,158.52