Finding the Fourth Proportional to 1,145.37, 1,580.66 and 703.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.37 : 1,580.66 = 703.42 : x
2. Step 2: Convert to fraction form
   1,145.37/1,580.66 = 703.42/x
3. Step 3: Cross multiply
   1,145.37x = 1,580.66 × 703.42
4. Step 4: Simplify right side
   1,145.37x = 1,111,867.54
5. Step 5: Solve for x
   x = 1,111,867.54/1,145.37
6. Step 6: Final answer
   x = 970.75