Finding the Fourth Proportional to 5,123.42, 7,070.67 and 2,885.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.42 : 7,070.67 = 2,885.50 : x
2. Step 2: Convert to fraction form
   5,123.42/7,070.67 = 2,885.50/x
3. Step 3: Cross multiply
   5,123.42x = 7,070.67 × 2,885.50
4. Step 4: Simplify right side
   5,123.42x = 20,402,418.29
5. Step 5: Solve for x
   x = 20,402,418.29/5,123.42
6. Step 6: Final answer
   x = 3,982.19