Finding the Fourth Proportional to 1,429.76, 1,973.24 and 870.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.76 : 1,973.24 = 870.26 : x
2. Step 2: Convert to fraction form
   1,429.76/1,973.24 = 870.26/x
3. Step 3: Cross multiply
   1,429.76x = 1,973.24 × 870.26
4. Step 4: Simplify right side
   1,429.76x = 1,717,231.84
5. Step 5: Solve for x
   x = 1,717,231.84/1,429.76
6. Step 6: Final answer
   x = 1,201.06