Finding the Fourth Proportional to 1,960.08, 2,938.72 and 919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.08 : 2,938.72 = 919.50 : x
2. Step 2: Convert to fraction form
   1,960.08/2,938.72 = 919.50/x
3. Step 3: Cross multiply
   1,960.08x = 2,938.72 × 919.50
4. Step 4: Simplify right side
   1,960.08x = 2,702,153.04
5. Step 5: Solve for x
   x = 2,702,153.04/1,960.08
6. Step 6: Final answer
   x = 1,378.59