Finding the Fourth Proportional to 5,123.57, 7,070.55 and 2,885.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.57 : 7,070.55 = 2,885.48 : x
2. Step 2: Convert to fraction form
   5,123.57/7,070.55 = 2,885.48/x
3. Step 3: Cross multiply
   5,123.57x = 7,070.55 × 2,885.48
4. Step 4: Simplify right side
   5,123.57x = 20,401,948.29
5. Step 5: Solve for x
   x = 20,401,948.29/5,123.57
6. Step 6: Final answer
   x = 3,981.98