Finding the Fourth Proportional to 1,145.54, 1,580.67 and 703.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.54 : 1,580.67 = 703.28 : x
2. Step 2: Convert to fraction form
   1,145.54/1,580.67 = 703.28/x
3. Step 3: Cross multiply
   1,145.54x = 1,580.67 × 703.28
4. Step 4: Simplify right side
   1,145.54x = 1,111,645.69
5. Step 5: Solve for x
   x = 1,111,645.69/1,145.54
6. Step 6: Final answer
   x = 970.42