Finding the Fourth Proportional to 1,086.17, 1,498.59 and 693.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.17 : 1,498.59 = 693.18 : x
2. Step 2: Convert to fraction form
   1,086.17/1,498.59 = 693.18/x
3. Step 3: Cross multiply
   1,086.17x = 1,498.59 × 693.18
4. Step 4: Simplify right side
   1,086.17x = 1,038,792.62
5. Step 5: Solve for x
   x = 1,038,792.62/1,086.17
6. Step 6: Final answer
   x = 956.39