Finding the Fourth Proportional to 5,123.36, 7,069.98 and 2,885.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.36 : 7,069.98 = 2,885.60 : x
2. Step 2: Convert to fraction form
   5,123.36/7,069.98 = 2,885.60/x
3. Step 3: Cross multiply
   5,123.36x = 7,069.98 × 2,885.60
4. Step 4: Simplify right side
   5,123.36x = 20,401,134.29
5. Step 5: Solve for x
   x = 20,401,134.29/5,123.36
6. Step 6: Final answer
   x = 3,981.98