Finding the Fourth Proportional to 1,940.50, 2,905.81 and 1,280.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.50 : 2,905.81 = 1,280.37 : x
2. Step 2: Convert to fraction form
   1,940.50/2,905.81 = 1,280.37/x
3. Step 3: Cross multiply
   1,940.50x = 2,905.81 × 1,280.37
4. Step 4: Simplify right side
   1,940.50x = 3,720,503.30
5. Step 5: Solve for x
   x = 3,720,503.30/1,940.50
6. Step 6: Final answer
   x = 1,917.30