Finding the Fourth Proportional to 1,072.56, 1,479.35 and 713.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.56 : 1,479.35 = 713.25 : x
2. Step 2: Convert to fraction form
   1,072.56/1,479.35 = 713.25/x
3. Step 3: Cross multiply
   1,072.56x = 1,479.35 × 713.25
4. Step 4: Simplify right side
   1,072.56x = 1,055,146.39
5. Step 5: Solve for x
   x = 1,055,146.39/1,072.56
6. Step 6: Final answer
   x = 983.76