Finding the Fourth Proportional to 1,533.47, 2,116.24 and 870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,533.47 : 2,116.24 = 870.30 : x
2. Step 2: Convert to fraction form
   1,533.47/2,116.24 = 870.30/x
3. Step 3: Cross multiply
   1,533.47x = 2,116.24 × 870.30
4. Step 4: Simplify right side
   1,533.47x = 1,841,761.50
5. Step 5: Solve for x
   x = 1,841,761.50/1,533.47
6. Step 6: Final answer
   x = 1,201.05