Finding the Fourth Proportional to 1,533.89, 2,116.62 and 870.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,533.89 : 2,116.62 = 870.71 : x
2. Step 2: Convert to fraction form
   1,533.89/2,116.62 = 870.71/x
3. Step 3: Cross multiply
   1,533.89x = 2,116.62 × 870.71
4. Step 4: Simplify right side
   1,533.89x = 1,842,951.62
5. Step 5: Solve for x
   x = 1,842,951.62/1,533.89
6. Step 6: Final answer
   x = 1,201.49