Finding the Fourth Proportional to 1,530.91, 2,112.42 and 867.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.91 : 2,112.42 = 867.58 : x
2. Step 2: Convert to fraction form
   1,530.91/2,112.42 = 867.58/x
3. Step 3: Cross multiply
   1,530.91x = 2,112.42 × 867.58
4. Step 4: Simplify right side
   1,530.91x = 1,832,693.34
5. Step 5: Solve for x
   x = 1,832,693.34/1,530.91
6. Step 6: Final answer
   x = 1,197.13