Finding the Fourth Proportional to 1,980.34, 2,968.55 and 938.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.34 : 2,968.55 = 938.50 : x
2. Step 2: Convert to fraction form
   1,980.34/2,968.55 = 938.50/x
3. Step 3: Cross multiply
   1,980.34x = 2,968.55 × 938.50
4. Step 4: Simplify right side
   1,980.34x = 2,785,984.18
5. Step 5: Solve for x
   x = 2,785,984.18/1,980.34
6. Step 6: Final answer
   x = 1,406.82