Finding the Fourth Proportional to 1,530.86, 2,112.60 and 867.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.86 : 2,112.60 = 867.59 : x
2. Step 2: Convert to fraction form
   1,530.86/2,112.60 = 867.59/x
3. Step 3: Cross multiply
   1,530.86x = 2,112.60 × 867.59
4. Step 4: Simplify right side
   1,530.86x = 1,832,868.81
5. Step 5: Solve for x
   x = 1,832,868.81/1,530.86
6. Step 6: Final answer
   x = 1,197.28