Finding the Fourth Proportional to 1,411.04, 1,947.12 and 781.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.04 : 1,947.12 = 781.56 : x
2. Step 2: Convert to fraction form
   1,411.04/1,947.12 = 781.56/x
3. Step 3: Cross multiply
   1,411.04x = 1,947.12 × 781.56
4. Step 4: Simplify right side
   1,411.04x = 1,521,788.18
5. Step 5: Solve for x
   x = 1,521,788.18/1,411.04
6. Step 6: Final answer
   x = 1,078.49