Finding the Fourth Proportional to 1,530.30, 2,111.74 and 867.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.30 : 2,111.74 = 867.15 : x
2. Step 2: Convert to fraction form
   1,530.30/2,111.74 = 867.15/x
3. Step 3: Cross multiply
   1,530.30x = 2,111.74 × 867.15
4. Step 4: Simplify right side
   1,530.30x = 1,831,195.34
5. Step 5: Solve for x
   x = 1,831,195.34/1,530.30
6. Step 6: Final answer
   x = 1,196.63