Finding the Fourth Proportional to 1,047.34, 1,570.74 and 316.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.34 : 1,570.74 = 316.72 : x
2. Step 2: Convert to fraction form
   1,047.34/1,570.74 = 316.72/x
3. Step 3: Cross multiply
   1,047.34x = 1,570.74 × 316.72
4. Step 4: Simplify right side
   1,047.34x = 497,484.77
5. Step 5: Solve for x
   x = 497,484.77/1,047.34
6. Step 6: Final answer
   x = 475.00