Finding the Fourth Proportional to 1,045.82, 1,568.88 and 315.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.82 : 1,568.88 = 315.30 : x
2. Step 2: Convert to fraction form
   1,045.82/1,568.88 = 315.30/x
3. Step 3: Cross multiply
   1,045.82x = 1,568.88 × 315.30
4. Step 4: Simplify right side
   1,045.82x = 494,667.86
5. Step 5: Solve for x
   x = 494,667.86/1,045.82
6. Step 6: Final answer
   x = 473.00