Finding the Fourth Proportional to 1,533.58, 2,116.46 and 870.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,533.58 : 2,116.46 = 870.59 : x
2. Step 2: Convert to fraction form
   1,533.58/2,116.46 = 870.59/x
3. Step 3: Cross multiply
   1,533.58x = 2,116.46 × 870.59
4. Step 4: Simplify right side
   1,533.58x = 1,842,568.91
5. Step 5: Solve for x
   x = 1,842,568.91/1,533.58
6. Step 6: Final answer
   x = 1,201.48