Finding the Fourth Proportional to 1,085.66, 1,498.24 and 620.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.66 : 1,498.24 = 620.06 : x
2. Step 2: Convert to fraction form
   1,085.66/1,498.24 = 620.06/x
3. Step 3: Cross multiply
   1,085.66x = 1,498.24 × 620.06
4. Step 4: Simplify right side
   1,085.66x = 928,989.65
5. Step 5: Solve for x
   x = 928,989.65/1,085.66
6. Step 6: Final answer
   x = 855.70