Finding the Fourth Proportional to 5,123.50, 7,070.84 and 2,885.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.50 : 7,070.84 = 2,885.25 : x
2. Step 2: Convert to fraction form
   5,123.50/7,070.84 = 2,885.25/x
3. Step 3: Cross multiply
   5,123.50x = 7,070.84 × 2,885.25
4. Step 4: Simplify right side
   5,123.50x = 20,401,120.59
5. Step 5: Solve for x
   x = 20,401,120.59/5,123.50
6. Step 6: Final answer
   x = 3,981.87