Finding the Fourth Proportional to 1,439.10, 1,986.31 and 942.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.10 : 1,986.31 = 942.94 : x
2. Step 2: Convert to fraction form
   1,439.10/1,986.31 = 942.94/x
3. Step 3: Cross multiply
   1,439.10x = 1,986.31 × 942.94
4. Step 4: Simplify right side
   1,439.10x = 1,872,971.15
5. Step 5: Solve for x
   x = 1,872,971.15/1,439.10
6. Step 6: Final answer
   x = 1,301.49