Finding the Fourth Proportional to 7,087.16, 10,630.72 and 2,156.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,087.16 : 10,630.72 = 2,156.80 : x
2. Step 2: Convert to fraction form
   7,087.16/10,630.72 = 2,156.80/x
3. Step 3: Cross multiply
   7,087.16x = 10,630.72 × 2,156.80
4. Step 4: Simplify right side
   7,087.16x = 22,928,336.90
5. Step 5: Solve for x
   x = 22,928,336.90/7,087.16
6. Step 6: Final answer
   x = 3,235.19