Finding the Fourth Proportional to 1,396.94, 1,929.35 and 1,085.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.94 : 1,929.35 = 1,085.96 : x
2. Step 2: Convert to fraction form
   1,396.94/1,929.35 = 1,085.96/x
3. Step 3: Cross multiply
   1,396.94x = 1,929.35 × 1,085.96
4. Step 4: Simplify right side
   1,396.94x = 2,095,204.46
5. Step 5: Solve for x
   x = 2,095,204.46/1,396.94
6. Step 6: Final answer
   x = 1,499.86