Finding the Fourth Proportional to 7,099.91, 10,647.40 and 2,100.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,099.91 : 10,647.40 = 2,100.79 : x
2. Step 2: Convert to fraction form
   7,099.91/10,647.40 = 2,100.79/x
3. Step 3: Cross multiply
   7,099.91x = 10,647.40 × 2,100.79
4. Step 4: Simplify right side
   7,099.91x = 22,367,951.45
5. Step 5: Solve for x
   x = 22,367,951.45/7,099.91
6. Step 6: Final answer
   x = 3,150.46