Finding the Fourth Proportional to 1,411.89, 1,947.02 and 1,012.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.89 : 1,947.02 = 1,012.88 : x
2. Step 2: Convert to fraction form
   1,411.89/1,947.02 = 1,012.88/x
3. Step 3: Cross multiply
   1,411.89x = 1,947.02 × 1,012.88
4. Step 4: Simplify right side
   1,411.89x = 1,972,097.62
5. Step 5: Solve for x
   x = 1,972,097.62/1,411.89
6. Step 6: Final answer
   x = 1,396.78