Finding the Fourth Proportional to 1,145.96, 1,581.46 and 703.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.96 : 1,581.46 = 703.60 : x
2. Step 2: Convert to fraction form
   1,145.96/1,581.46 = 703.60/x
3. Step 3: Cross multiply
   1,145.96x = 1,581.46 × 703.60
4. Step 4: Simplify right side
   1,145.96x = 1,112,715.26
5. Step 5: Solve for x
   x = 1,112,715.26/1,145.96
6. Step 6: Final answer
   x = 970.99