Finding the Fourth Proportional to 1,034.55, 1,552.83 and 645.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.55 : 1,552.83 = 645.30 : x
2. Step 2: Convert to fraction form
   1,034.55/1,552.83 = 645.30/x
3. Step 3: Cross multiply
   1,034.55x = 1,552.83 × 645.30
4. Step 4: Simplify right side
   1,034.55x = 1,002,041.20
5. Step 5: Solve for x
   x = 1,002,041.20/1,034.55
6. Step 6: Final answer
   x = 968.58