Finding the Fourth Proportional to 1,022.38, 1,525.72 and 913.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,022.38 : 1,525.72 = 913.04 : x
2. Step 2: Convert to fraction form
   1,022.38/1,525.72 = 913.04/x
3. Step 3: Cross multiply
   1,022.38x = 1,525.72 × 913.04
4. Step 4: Simplify right side
   1,022.38x = 1,393,043.39
5. Step 5: Solve for x
   x = 1,393,043.39/1,022.38
6. Step 6: Final answer
   x = 1,362.55