Finding the Fourth Proportional to 1,017.56, 1,528.91 and 976.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.56 : 1,528.91 = 976.56 : x
2. Step 2: Convert to fraction form
   1,017.56/1,528.91 = 976.56/x
3. Step 3: Cross multiply
   1,017.56x = 1,528.91 × 976.56
4. Step 4: Simplify right side
   1,017.56x = 1,493,059.82
5. Step 5: Solve for x
   x = 1,493,059.82/1,017.56
6. Step 6: Final answer
   x = 1,467.29