Finding the Fourth Proportional to 1,541.49, 2,127.15 and 878.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,541.49 : 2,127.15 = 878.37 : x
2. Step 2: Convert to fraction form
   1,541.49/2,127.15 = 878.37/x
3. Step 3: Cross multiply
   1,541.49x = 2,127.15 × 878.37
4. Step 4: Simplify right side
   1,541.49x = 1,868,424.75
5. Step 5: Solve for x
   x = 1,868,424.75/1,541.49
6. Step 6: Final answer
   x = 1,212.09