Finding the Fourth Proportional to 2,521.55, 3,783.84 and 879.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.55 : 3,783.84 = 879.25 : x
2. Step 2: Convert to fraction form
   2,521.55/3,783.84 = 879.25/x
3. Step 3: Cross multiply
   2,521.55x = 3,783.84 × 879.25
4. Step 4: Simplify right side
   2,521.55x = 3,326,941.32
5. Step 5: Solve for x
   x = 3,326,941.32/2,521.55
6. Step 6: Final answer
   x = 1,319.40