Finding the Fourth Proportional to 1,439.76, 1,986.35 and 942.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.76 : 1,986.35 = 942.69 : x
2. Step 2: Convert to fraction form
   1,439.76/1,986.35 = 942.69/x
3. Step 3: Cross multiply
   1,439.76x = 1,986.35 × 942.69
4. Step 4: Simplify right side
   1,439.76x = 1,872,512.28
5. Step 5: Solve for x
   x = 1,872,512.28/1,439.76
6. Step 6: Final answer
   x = 1,300.57