Finding the Fourth Proportional to 3,438.39, 5,158.17 and 1,129.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,438.39 : 5,158.17 = 1,129.89 : x
2. Step 2: Convert to fraction form
   3,438.39/5,158.17 = 1,129.89/x
3. Step 3: Cross multiply
   3,438.39x = 5,158.17 × 1,129.89
4. Step 4: Simplify right side
   3,438.39x = 5,828,164.70
5. Step 5: Solve for x
   x = 5,828,164.70/3,438.39
6. Step 6: Final answer
   x = 1,695.03