Finding the Fourth Proportional to 2,263.60, 3,394.34 and 877.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,263.60 : 3,394.34 = 877.60 : x
2. Step 2: Convert to fraction form
   2,263.60/3,394.34 = 877.60/x
3. Step 3: Cross multiply
   2,263.60x = 3,394.34 × 877.60
4. Step 4: Simplify right side
   2,263.60x = 2,978,872.78
5. Step 5: Solve for x
   x = 2,978,872.78/2,263.60
6. Step 6: Final answer
   x = 1,315.99