Finding the Fourth Proportional to 1,072.36, 1,478.27 and 756.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.36 : 1,478.27 = 756.59 : x
2. Step 2: Convert to fraction form
   1,072.36/1,478.27 = 756.59/x
3. Step 3: Cross multiply
   1,072.36x = 1,478.27 × 756.59
4. Step 4: Simplify right side
   1,072.36x = 1,118,440.52
5. Step 5: Solve for x
   x = 1,118,440.52/1,072.36
6. Step 6: Final answer
   x = 1,042.98