Finding the Fourth Proportional to 1,086.21, 1,498.10 and 693.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.21 : 1,498.10 = 693.77 : x
2. Step 2: Convert to fraction form
   1,086.21/1,498.10 = 693.77/x
3. Step 3: Cross multiply
   1,086.21x = 1,498.10 × 693.77
4. Step 4: Simplify right side
   1,086.21x = 1,039,325.88
5. Step 5: Solve for x
   x = 1,039,325.88/1,086.21
6. Step 6: Final answer
   x = 956.84