Finding the Fourth Proportional to 1,428.82, 1,972.45 and 1,074.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.82 : 1,972.45 = 1,074.88 : x
2. Step 2: Convert to fraction form
   1,428.82/1,972.45 = 1,074.88/x
3. Step 3: Cross multiply
   1,428.82x = 1,972.45 × 1,074.88
4. Step 4: Simplify right side
   1,428.82x = 2,120,144.49
5. Step 5: Solve for x
   x = 2,120,144.49/1,428.82
6. Step 6: Final answer
   x = 1,483.84