Finding the Fourth Proportional to 1,145.63, 1,581.01 and 703.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.63 : 1,581.01 = 703.28 : x
2. Step 2: Convert to fraction form
   1,145.63/1,581.01 = 703.28/x
3. Step 3: Cross multiply
   1,145.63x = 1,581.01 × 703.28
4. Step 4: Simplify right side
   1,145.63x = 1,111,894.91
5. Step 5: Solve for x
   x = 1,111,894.91/1,145.63
6. Step 6: Final answer
   x = 970.55