Finding the Fourth Proportional to 1,530.20, 2,111.60 and 867.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.20 : 2,111.60 = 867.18 : x
2. Step 2: Convert to fraction form
   1,530.20/2,111.60 = 867.18/x
3. Step 3: Cross multiply
   1,530.20x = 2,111.60 × 867.18
4. Step 4: Simplify right side
   1,530.20x = 1,831,137.29
5. Step 5: Solve for x
   x = 1,831,137.29/1,530.20
6. Step 6: Final answer
   x = 1,196.67