Finding the Fourth Proportional to 1,085.87, 1,498.47 and 613.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.87 : 1,498.47 = 613.82 : x
2. Step 2: Convert to fraction form
   1,085.87/1,498.47 = 613.82/x
3. Step 3: Cross multiply
   1,085.87x = 1,498.47 × 613.82
4. Step 4: Simplify right side
   1,085.87x = 919,790.86
5. Step 5: Solve for x
   x = 919,790.86/1,085.87
6. Step 6: Final answer
   x = 847.05