Finding the Fourth Proportional to 5,621.94, 7,760.43 and 5,031.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,621.94 : 7,760.43 = 5,031.42 : x
2. Step 2: Convert to fraction form
   5,621.94/7,760.43 = 5,031.42/x
3. Step 3: Cross multiply
   5,621.94x = 7,760.43 × 5,031.42
4. Step 4: Simplify right side
   5,621.94x = 39,045,982.71
5. Step 5: Solve for x
   x = 39,045,982.71/5,621.94
6. Step 6: Final answer
   x = 6,945.29