Finding the Fourth Proportional to 1,426, 1,967.88 and 1,012.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426 : 1,967.88 = 1,012.72 : x
2. Step 2: Convert to fraction form
   1,426/1,967.88 = 1,012.72/x
3. Step 3: Cross multiply
   1,426x = 1,967.88 × 1,012.72
4. Step 4: Simplify right side
   1,426x = 1,992,911.43
5. Step 5: Solve for x
   x = 1,992,911.43/1,426
6. Step 6: Final answer
   x = 1,397.55