Finding the Fourth Proportional to 1,429.80, 1,973.15 and 870.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.80 : 1,973.15 = 870.29 : x
2. Step 2: Convert to fraction form
   1,429.80/1,973.15 = 870.29/x
3. Step 3: Cross multiply
   1,429.80x = 1,973.15 × 870.29
4. Step 4: Simplify right side
   1,429.80x = 1,717,198.50
5. Step 5: Solve for x
   x = 1,717,198.50/1,429.80
6. Step 6: Final answer
   x = 1,201.01