Finding the Fourth Proportional to 1,488.69, 2,235.65 and 1,429.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.69 : 2,235.65 = 1,429.92 : x
2. Step 2: Convert to fraction form
   1,488.69/2,235.65 = 1,429.92/x
3. Step 3: Cross multiply
   1,488.69x = 2,235.65 × 1,429.92
4. Step 4: Simplify right side
   1,488.69x = 3,196,793.50
5. Step 5: Solve for x
   x = 3,196,793.50/1,488.69
6. Step 6: Final answer
   x = 2,147.39