Finding the Fourth Proportional to 5,122.55, 7,068.89 and 2,884.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,122.55 : 7,068.89 = 2,884.40 : x
2. Step 2: Convert to fraction form
   5,122.55/7,068.89 = 2,884.40/x
3. Step 3: Cross multiply
   5,122.55x = 7,068.89 × 2,884.40
4. Step 4: Simplify right side
   5,122.55x = 20,389,456.55
5. Step 5: Solve for x
   x = 20,389,456.55/5,122.55
6. Step 6: Final answer
   x = 3,980.34