Finding the Fourth Proportional to 1,052.10, 1,451.91 and 580.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.10 : 1,451.91 = 580.05 : x
2. Step 2: Convert to fraction form
   1,052.10/1,451.91 = 580.05/x
3. Step 3: Cross multiply
   1,052.10x = 1,451.91 × 580.05
4. Step 4: Simplify right side
   1,052.10x = 842,180.40
5. Step 5: Solve for x
   x = 842,180.40/1,052.10
6. Step 6: Final answer
   x = 800.48