Finding the Fourth Proportional to 1,417.91, 2,123.21 and 868.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.91 : 2,123.21 = 868.42 : x
2. Step 2: Convert to fraction form
   1,417.91/2,123.21 = 868.42/x
3. Step 3: Cross multiply
   1,417.91x = 2,123.21 × 868.42
4. Step 4: Simplify right side
   1,417.91x = 1,843,842.85
5. Step 5: Solve for x
   x = 1,843,842.85/1,417.91
6. Step 6: Final answer
   x = 1,300.40