Finding the Fourth Proportional to 1,438.71, 1,982.66 and 1,023.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.71 : 1,982.66 = 1,023.99 : x
2. Step 2: Convert to fraction form
   1,438.71/1,982.66 = 1,023.99/x
3. Step 3: Cross multiply
   1,438.71x = 1,982.66 × 1,023.99
4. Step 4: Simplify right side
   1,438.71x = 2,030,218.89
5. Step 5: Solve for x
   x = 2,030,218.89/1,438.71
6. Step 6: Final answer
   x = 1,411.14