Finding the Fourth Proportional to 1,768.36, 2,439.95 and 1,069.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.36 : 2,439.95 = 1,069.72 : x
2. Step 2: Convert to fraction form
   1,768.36/2,439.95 = 1,069.72/x
3. Step 3: Cross multiply
   1,768.36x = 2,439.95 × 1,069.72
4. Step 4: Simplify right side
   1,768.36x = 2,610,063.31
5. Step 5: Solve for x
   x = 2,610,063.31/1,768.36
6. Step 6: Final answer
   x = 1,475.98