Finding the Fourth Proportional to 1,530.37, 2,111.95 and 867.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.37 : 2,111.95 = 867.20 : x
2. Step 2: Convert to fraction form
   1,530.37/2,111.95 = 867.20/x
3. Step 3: Cross multiply
   1,530.37x = 2,111.95 × 867.20
4. Step 4: Simplify right side
   1,530.37x = 1,831,483.04
5. Step 5: Solve for x
   x = 1,831,483.04/1,530.37
6. Step 6: Final answer
   x = 1,196.76