Finding the Fourth Proportional to 3,516.86, 4,853.20 and 2,100.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,516.86 : 4,853.20 = 2,100.86 : x
2. Step 2: Convert to fraction form
   3,516.86/4,853.20 = 2,100.86/x
3. Step 3: Cross multiply
   3,516.86x = 4,853.20 × 2,100.86
4. Step 4: Simplify right side
   3,516.86x = 10,195,905.89
5. Step 5: Solve for x
   x = 10,195,905.89/3,516.86
6. Step 6: Final answer
   x = 2,899.15