Finding the Fourth Proportional to 5,108.94, 7,049.70 and 2,870.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,108.94 : 7,049.70 = 2,870.55 : x
2. Step 2: Convert to fraction form
   5,108.94/7,049.70 = 2,870.55/x
3. Step 3: Cross multiply
   5,108.94x = 7,049.70 × 2,870.55
4. Step 4: Simplify right side
   5,108.94x = 20,236,516.34
5. Step 5: Solve for x
   x = 20,236,516.34/5,108.94
6. Step 6: Final answer
   x = 3,961.00