Finding the Fourth Proportional to 1,072.36, 1,479.42 and 652.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.36 : 1,479.42 = 652.72 : x
2. Step 2: Convert to fraction form
   1,072.36/1,479.42 = 652.72/x
3. Step 3: Cross multiply
   1,072.36x = 1,479.42 × 652.72
4. Step 4: Simplify right side
   1,072.36x = 965,647.02
5. Step 5: Solve for x
   x = 965,647.02/1,072.36
6. Step 6: Final answer
   x = 900.49