Finding the Fourth Proportional to 1,145.92, 1,580.56 and 704.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.92 : 1,580.56 = 704.07 : x
2. Step 2: Convert to fraction form
   1,145.92/1,580.56 = 704.07/x
3. Step 3: Cross multiply
   1,145.92x = 1,580.56 × 704.07
4. Step 4: Simplify right side
   1,145.92x = 1,112,824.88
5. Step 5: Solve for x
   x = 1,112,824.88/1,145.92
6. Step 6: Final answer
   x = 971.12