Finding the Fourth Proportional to 1,439.76, 1,985.99 and 942.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.76 : 1,985.99 = 942.41 : x
2. Step 2: Convert to fraction form
   1,439.76/1,985.99 = 942.41/x
3. Step 3: Cross multiply
   1,439.76x = 1,985.99 × 942.41
4. Step 4: Simplify right side
   1,439.76x = 1,871,602.19
5. Step 5: Solve for x
   x = 1,871,602.19/1,439.76
6. Step 6: Final answer
   x = 1,299.94