Finding the Fourth Proportional to 6,781.76, 10,168.72 and 2,100.52

Step by Step Solution

1. Step 1: Write the proportion equation
   6,781.76 : 10,168.72 = 2,100.52 : x
2. Step 2: Convert to fraction form
   6,781.76/10,168.72 = 2,100.52/x
3. Step 3: Cross multiply
   6,781.76x = 10,168.72 × 2,100.52
4. Step 4: Simplify right side
   6,781.76x = 21,359,599.73
5. Step 5: Solve for x
   x = 21,359,599.73/6,781.76
6. Step 6: Final answer
   x = 3,149.57