Finding the Fourth Proportional to 2,019.47, 2,787.62 and 1,311.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.47 : 2,787.62 = 1,311.48 : x
2. Step 2: Convert to fraction form
   2,019.47/2,787.62 = 1,311.48/x
3. Step 3: Cross multiply
   2,019.47x = 2,787.62 × 1,311.48
4. Step 4: Simplify right side
   2,019.47x = 3,655,901.32
5. Step 5: Solve for x
   x = 3,655,901.32/2,019.47
6. Step 6: Final answer
   x = 1,810.33