Finding the Fourth Proportional to 1,980.06, 2,968.74 and 939.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.06 : 2,968.74 = 939.48 : x
2. Step 2: Convert to fraction form
   1,980.06/2,968.74 = 939.48/x
3. Step 3: Cross multiply
   1,980.06x = 2,968.74 × 939.48
4. Step 4: Simplify right side
   1,980.06x = 2,789,071.86
5. Step 5: Solve for x
   x = 2,789,071.86/1,980.06
6. Step 6: Final answer
   x = 1,408.58