Finding the Fourth Proportional to 2,988.42, 4,483.23 and 1,139.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,988.42 : 4,483.23 = 1,139.19 : x
2. Step 2: Convert to fraction form
   2,988.42/4,483.23 = 1,139.19/x
3. Step 3: Cross multiply
   2,988.42x = 4,483.23 × 1,139.19
4. Step 4: Simplify right side
   2,988.42x = 5,107,250.78
5. Step 5: Solve for x
   x = 5,107,250.78/2,988.42
6. Step 6: Final answer
   x = 1,709.01