Finding the Fourth Proportional to 2,269.85, 3,129.86 and 1,429.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.85 : 3,129.86 = 1,429.54 : x
2. Step 2: Convert to fraction form
   2,269.85/3,129.86 = 1,429.54/x
3. Step 3: Cross multiply
   2,269.85x = 3,129.86 × 1,429.54
4. Step 4: Simplify right side
   2,269.85x = 4,474,255.81
5. Step 5: Solve for x
   x = 4,474,255.81/2,269.85
6. Step 6: Final answer
   x = 1,971.17