Finding the Fourth Proportional to 2,521.49, 3,783.95 and 878.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.49 : 3,783.95 = 878.03 : x
2. Step 2: Convert to fraction form
   2,521.49/3,783.95 = 878.03/x
3. Step 3: Cross multiply
   2,521.49x = 3,783.95 × 878.03
4. Step 4: Simplify right side
   2,521.49x = 3,322,417.23
5. Step 5: Solve for x
   x = 3,322,417.23/2,521.49
6. Step 6: Final answer
   x = 1,317.64