Finding the Fourth Proportional to 2,100.69, 3,151.08 and 867.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.69 : 3,151.08 = 867.76 : x
2. Step 2: Convert to fraction form
   2,100.69/3,151.08 = 867.76/x
3. Step 3: Cross multiply
   2,100.69x = 3,151.08 × 867.76
4. Step 4: Simplify right side
   2,100.69x = 2,734,373.30
5. Step 5: Solve for x
   x = 2,734,373.30/2,100.69
6. Step 6: Final answer
   x = 1,301.65