Finding the Fourth Proportional to 7,087.31, 10,621.71 and 2,922.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,087.31 : 10,621.71 = 2,922.56 : x
2. Step 2: Convert to fraction form
   7,087.31/10,621.71 = 2,922.56/x
3. Step 3: Cross multiply
   7,087.31x = 10,621.71 × 2,922.56
4. Step 4: Simplify right side
   7,087.31x = 31,042,584.78
5. Step 5: Solve for x
   x = 31,042,584.78/7,087.31
6. Step 6: Final answer
   x = 4,380.02