Finding the Fourth Proportional to 5,123.16, 7,069.90 and 2,885.26

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.16 : 7,069.90 = 2,885.26 : x
2. Step 2: Convert to fraction form
   5,123.16/7,069.90 = 2,885.26/x
3. Step 3: Cross multiply
   5,123.16x = 7,069.90 × 2,885.26
4. Step 4: Simplify right side
   5,123.16x = 20,398,499.67
5. Step 5: Solve for x
   x = 20,398,499.67/5,123.16
6. Step 6: Final answer
   x = 3,981.62