Finding the Fourth Proportional to 1,533.98, 2,116.83 and 870.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,533.98 : 2,116.83 = 870.83 : x
2. Step 2: Convert to fraction form
   1,533.98/2,116.83 = 870.83/x
3. Step 3: Cross multiply
   1,533.98x = 2,116.83 × 870.83
4. Step 4: Simplify right side
   1,533.98x = 1,843,399.69
5. Step 5: Solve for x
   x = 1,843,399.69/1,533.98
6. Step 6: Final answer
   x = 1,201.71