Finding the Fourth Proportional to 1,926.15, 2,658.09 and 1,086.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,926.15 : 2,658.09 = 1,086.89 : x
2. Step 2: Convert to fraction form
   1,926.15/2,658.09 = 1,086.89/x
3. Step 3: Cross multiply
   1,926.15x = 2,658.09 × 1,086.89
4. Step 4: Simplify right side
   1,926.15x = 2,889,042.23
5. Step 5: Solve for x
   x = 2,889,042.23/1,926.15
6. Step 6: Final answer
   x = 1,499.91