Finding the Fourth Proportional to 5,123.18, 7,069.90 and 2,885.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.18 : 7,069.90 = 2,885.04 : x
2. Step 2: Convert to fraction form
   5,123.18/7,069.90 = 2,885.04/x
3. Step 3: Cross multiply
   5,123.18x = 7,069.90 × 2,885.04
4. Step 4: Simplify right side
   5,123.18x = 20,396,944.30
5. Step 5: Solve for x
   x = 20,396,944.30/5,123.18
6. Step 6: Final answer
   x = 3,981.31