Finding the Fourth Proportional to 2,613.30, 3,921.30 and 1,152.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.30 : 3,921.30 = 1,152.60 : x
2. Step 2: Convert to fraction form
   2,613.30/3,921.30 = 1,152.60/x
3. Step 3: Cross multiply
   2,613.30x = 3,921.30 × 1,152.60
4. Step 4: Simplify right side
   2,613.30x = 4,519,690.38
5. Step 5: Solve for x
   x = 4,519,690.38/2,613.30
6. Step 6: Final answer
   x = 1,729.50