Finding the Fourth Proportional to 2,521.48, 3,783.18 and 878.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.48 : 3,783.18 = 878.20 : x
2. Step 2: Convert to fraction form
   2,521.48/3,783.18 = 878.20/x
3. Step 3: Cross multiply
   2,521.48x = 3,783.18 × 878.20
4. Step 4: Simplify right side
   2,521.48x = 3,322,388.68
5. Step 5: Solve for x
   x = 3,322,388.68/2,521.48
6. Step 6: Final answer
   x = 1,317.63