Finding the Fourth Proportional to 1,085.77, 1,498.53 and 693.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.77 : 1,498.53 = 693.73 : x
2. Step 2: Convert to fraction form
   1,085.77/1,498.53 = 693.73/x
3. Step 3: Cross multiply
   1,085.77x = 1,498.53 × 693.73
4. Step 4: Simplify right side
   1,085.77x = 1,039,575.22
5. Step 5: Solve for x
   x = 1,039,575.22/1,085.77
6. Step 6: Final answer
   x = 957.45