Finding the Fourth Proportional to 3,438.30, 5,158.17 and 1,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,438.30 : 5,158.17 = 1,129.50 : x
2. Step 2: Convert to fraction form
   3,438.30/5,158.17 = 1,129.50/x
3. Step 3: Cross multiply
   3,438.30x = 5,158.17 × 1,129.50
4. Step 4: Simplify right side
   3,438.30x = 5,826,153.02
5. Step 5: Solve for x
   x = 5,826,153.02/3,438.30
6. Step 6: Final answer
   x = 1,694.49