Finding the Fourth Proportional to 1,079.59, 1,620.18 and 802.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.59 : 1,620.18 = 802.58 : x
2. Step 2: Convert to fraction form
   1,079.59/1,620.18 = 802.58/x
3. Step 3: Cross multiply
   1,079.59x = 1,620.18 × 802.58
4. Step 4: Simplify right side
   1,079.59x = 1,300,315.96
5. Step 5: Solve for x
   x = 1,300,315.96/1,079.59
6. Step 6: Final answer
   x = 1,204.46