Finding the Fourth Proportional to 1,086.10, 1,498.15 and 693.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.10 : 1,498.15 = 693.35 : x
2. Step 2: Convert to fraction form
   1,086.10/1,498.15 = 693.35/x
3. Step 3: Cross multiply
   1,086.10x = 1,498.15 × 693.35
4. Step 4: Simplify right side
   1,086.10x = 1,038,742.30
5. Step 5: Solve for x
   x = 1,038,742.30/1,086.10
6. Step 6: Final answer
   x = 956.40