Finding the Fourth Proportional to 1,428.12, 2,132.28 and 1,262.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.12 : 2,132.28 = 1,262.52 : x
2. Step 2: Convert to fraction form
   1,428.12/2,132.28 = 1,262.52/x
3. Step 3: Cross multiply
   1,428.12x = 2,132.28 × 1,262.52
4. Step 4: Simplify right side
   1,428.12x = 2,692,046.15
5. Step 5: Solve for x
   x = 2,692,046.15/1,428.12
6. Step 6: Final answer
   x = 1,885.03