Finding the Fourth Proportional to 1,533.98, 2,116.88 and 870.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,533.98 : 2,116.88 = 870.82 : x
2. Step 2: Convert to fraction form
   1,533.98/2,116.88 = 870.82/x
3. Step 3: Cross multiply
   1,533.98x = 2,116.88 × 870.82
4. Step 4: Simplify right side
   1,533.98x = 1,843,421.44
5. Step 5: Solve for x
   x = 1,843,421.44/1,533.98
6. Step 6: Final answer
   x = 1,201.72