Finding the Fourth Proportional to 1,927.85, 2,658.89 and 1,396.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,927.85 : 2,658.89 = 1,396.81 : x
2. Step 2: Convert to fraction form
   1,927.85/2,658.89 = 1,396.81/x
3. Step 3: Cross multiply
   1,927.85x = 2,658.89 × 1,396.81
4. Step 4: Simplify right side
   1,927.85x = 3,713,943.86
5. Step 5: Solve for x
   x = 3,713,943.86/1,927.85
6. Step 6: Final answer
   x = 1,926.47