Finding the Fourth Proportional to 1,533.89, 2,116.73 and 870.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,533.89 : 2,116.73 = 870.84 : x
2. Step 2: Convert to fraction form
   1,533.89/2,116.73 = 870.84/x
3. Step 3: Cross multiply
   1,533.89x = 2,116.73 × 870.84
4. Step 4: Simplify right side
   1,533.89x = 1,843,335.33
5. Step 5: Solve for x
   x = 1,843,335.33/1,533.89
6. Step 6: Final answer
   x = 1,201.74