Finding the Fourth Proportional to 1,960.78, 2,705.88 and 1,064.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.78 : 2,705.88 = 1,064.50 : x
2. Step 2: Convert to fraction form
   1,960.78/2,705.88 = 1,064.50/x
3. Step 3: Cross multiply
   1,960.78x = 2,705.88 × 1,064.50
4. Step 4: Simplify right side
   1,960.78x = 2,880,422.52
5. Step 5: Solve for x
   x = 2,880,422.52/1,960.78
6. Step 6: Final answer
   x = 1,469.02