Finding the Fourth Proportional to 5,123.15, 7,070.33 and 2,885.27

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.15 : 7,070.33 = 2,885.27 : x
2. Step 2: Convert to fraction form
   5,123.15/7,070.33 = 2,885.27/x
3. Step 3: Cross multiply
   5,123.15x = 7,070.33 × 2,885.27
4. Step 4: Simplify right side
   5,123.15x = 20,399,811.04
5. Step 5: Solve for x
   x = 20,399,811.04/5,123.15
6. Step 6: Final answer
   x = 3,981.89