Finding the Fourth Proportional to 1,085.01, 1,497.24 and 612.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.01 : 1,497.24 = 612.89 : x
2. Step 2: Convert to fraction form
   1,085.01/1,497.24 = 612.89/x
3. Step 3: Cross multiply
   1,085.01x = 1,497.24 × 612.89
4. Step 4: Simplify right side
   1,085.01x = 917,635.94
5. Step 5: Solve for x
   x = 917,635.94/1,085.01
6. Step 6: Final answer
   x = 845.74