Finding the Fourth Proportional to 2,429.64, 3,643.42 and 870.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.64 : 3,643.42 = 870.05 : x
2. Step 2: Convert to fraction form
   2,429.64/3,643.42 = 870.05/x
3. Step 3: Cross multiply
   2,429.64x = 3,643.42 × 870.05
4. Step 4: Simplify right side
   2,429.64x = 3,169,957.57
5. Step 5: Solve for x
   x = 3,169,957.57/2,429.64
6. Step 6: Final answer
   x = 1,304.70