Finding the Fourth Proportional to 1,086.84, 1,498.64 and 693.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.84 : 1,498.64 = 693.72 : x
2. Step 2: Convert to fraction form
   1,086.84/1,498.64 = 693.72/x
3. Step 3: Cross multiply
   1,086.84x = 1,498.64 × 693.72
4. Step 4: Simplify right side
   1,086.84x = 1,039,633.07
5. Step 5: Solve for x
   x = 1,039,633.07/1,086.84
6. Step 6: Final answer
   x = 956.56