Finding the Fourth Proportional to 5,123.98, 7,071.10 and 2,885.84

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.98 : 7,071.10 = 2,885.84 : x
2. Step 2: Convert to fraction form
   5,123.98/7,071.10 = 2,885.84/x
3. Step 3: Cross multiply
   5,123.98x = 7,071.10 × 2,885.84
4. Step 4: Simplify right side
   5,123.98x = 20,406,063.22
5. Step 5: Solve for x
   x = 20,406,063.22/5,123.98
6. Step 6: Final answer
   x = 3,982.46