Finding the Fourth Proportional to 1,040.69, 1,560.57 and 310.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.69 : 1,560.57 = 310.01 : x
2. Step 2: Convert to fraction form
   1,040.69/1,560.57 = 310.01/x
3. Step 3: Cross multiply
   1,040.69x = 1,560.57 × 310.01
4. Step 4: Simplify right side
   1,040.69x = 483,792.31
5. Step 5: Solve for x
   x = 483,792.31/1,040.69
6. Step 6: Final answer
   x = 464.88