Finding the Fourth Proportional to 1,085.90, 1,499.29 and 693.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.90 : 1,499.29 = 693.45 : x
2. Step 2: Convert to fraction form
   1,085.90/1,499.29 = 693.45/x
3. Step 3: Cross multiply
   1,085.90x = 1,499.29 × 693.45
4. Step 4: Simplify right side
   1,085.90x = 1,039,680.92
5. Step 5: Solve for x
   x = 1,039,680.92/1,085.90
6. Step 6: Final answer
   x = 957.44