Finding the Fourth Proportional to 774.72, 1,162.52 and 288.10

Step by Step Solution

1. Step 1: Write the proportion equation
   774.72 : 1,162.52 = 288.10 : x
2. Step 2: Convert to fraction form
   774.72/1,162.52 = 288.10/x
3. Step 3: Cross multiply
   774.72x = 1,162.52 × 288.10
4. Step 4: Simplify right side
   774.72x = 334,922.01
5. Step 5: Solve for x
   x = 334,922.01/774.72
6. Step 6: Final answer
   x = 432.31