Finding the Fourth Proportional to 1,145.55, 1,580.02 and 703.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.55 : 1,580.02 = 703.69 : x
2. Step 2: Convert to fraction form
   1,145.55/1,580.02 = 703.69/x
3. Step 3: Cross multiply
   1,145.55x = 1,580.02 × 703.69
4. Step 4: Simplify right side
   1,145.55x = 1,111,844.27
5. Step 5: Solve for x
   x = 1,111,844.27/1,145.55
6. Step 6: Final answer
   x = 970.58