Finding the Fourth Proportional to 1,439.37, 1,986.93 and 1,019.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.37 : 1,986.93 = 1,019.79 : x
2. Step 2: Convert to fraction form
   1,439.37/1,986.93 = 1,019.79/x
3. Step 3: Cross multiply
   1,439.37x = 1,986.93 × 1,019.79
4. Step 4: Simplify right side
   1,439.37x = 2,026,251.34
5. Step 5: Solve for x
   x = 2,026,251.34/1,439.37
6. Step 6: Final answer
   x = 1,407.73