Finding the Fourth Proportional to 1,047.45, 1,570.98 and 316.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.45 : 1,570.98 = 316.83 : x
2. Step 2: Convert to fraction form
   1,047.45/1,570.98 = 316.83/x
3. Step 3: Cross multiply
   1,047.45x = 1,570.98 × 316.83
4. Step 4: Simplify right side
   1,047.45x = 497,738.89
5. Step 5: Solve for x
   x = 497,738.89/1,047.45
6. Step 6: Final answer
   x = 475.19