Finding the Fourth Proportional to 1,429.60, 2,143.68 and 699.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.60 : 2,143.68 = 699.52 : x
2. Step 2: Convert to fraction form
   1,429.60/2,143.68 = 699.52/x
3. Step 3: Cross multiply
   1,429.60x = 2,143.68 × 699.52
4. Step 4: Simplify right side
   1,429.60x = 1,499,547.03
5. Step 5: Solve for x
   x = 1,499,547.03/1,429.60
6. Step 6: Final answer
   x = 1,048.93