Finding the Fourth Proportional to 1,960.32, 2,706.12 and 1,215.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,960.32 : 2,706.12 = 1,215.32 : x
2. Step 2: Convert to fraction form
   1,960.32/2,706.12 = 1,215.32/x
3. Step 3: Cross multiply
   1,960.32x = 2,706.12 × 1,215.32
4. Step 4: Simplify right side
   1,960.32x = 3,288,801.76
5. Step 5: Solve for x
   x = 3,288,801.76/1,960.32
6. Step 6: Final answer
   x = 1,677.69