Finding the Fourth Proportional to 1,072.17, 1,478.76 and 699.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.17 : 1,478.76 = 699.27 : x
2. Step 2: Convert to fraction form
   1,072.17/1,478.76 = 699.27/x
3. Step 3: Cross multiply
   1,072.17x = 1,478.76 × 699.27
4. Step 4: Simplify right side
   1,072.17x = 1,034,044.34
5. Step 5: Solve for x
   x = 1,034,044.34/1,072.17
6. Step 6: Final answer
   x = 964.44