Finding the Fourth Proportional to 1,147.20, 1,581.42 and 704.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.20 : 1,581.42 = 704.76 : x
2. Step 2: Convert to fraction form
   1,147.20/1,581.42 = 704.76/x
3. Step 3: Cross multiply
   1,147.20x = 1,581.42 × 704.76
4. Step 4: Simplify right side
   1,147.20x = 1,114,521.56
5. Step 5: Solve for x
   x = 1,114,521.56/1,147.20
6. Step 6: Final answer
   x = 971.51