Finding the Fourth Proportional to 1,047.29, 1,570.69 and 353.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.29 : 1,570.69 = 353.78 : x
2. Step 2: Convert to fraction form
   1,047.29/1,570.69 = 353.78/x
3. Step 3: Cross multiply
   1,047.29x = 1,570.69 × 353.78
4. Step 4: Simplify right side
   1,047.29x = 555,678.71
5. Step 5: Solve for x
   x = 555,678.71/1,047.29
6. Step 6: Final answer
   x = 530.59