Finding the Fourth Proportional to 1,411.74, 1,947.78 and 887.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.74 : 1,947.78 = 887.40 : x
2. Step 2: Convert to fraction form
   1,411.74/1,947.78 = 887.40/x
3. Step 3: Cross multiply
   1,411.74x = 1,947.78 × 887.40
4. Step 4: Simplify right side
   1,411.74x = 1,728,459.97
5. Step 5: Solve for x
   x = 1,728,459.97/1,411.74
6. Step 6: Final answer
   x = 1,224.35