Finding the Fourth Proportional to 1,379.50, 1,900.49 and 1,129.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.50 : 1,900.49 = 1,129.37 : x
2. Step 2: Convert to fraction form
   1,379.50/1,900.49 = 1,129.37/x
3. Step 3: Cross multiply
   1,379.50x = 1,900.49 × 1,129.37
4. Step 4: Simplify right side
   1,379.50x = 2,146,341.24
5. Step 5: Solve for x
   x = 2,146,341.24/1,379.50
6. Step 6: Final answer
   x = 1,555.89