Finding the Fourth Proportional to 3,100.68, 4,680.18 and 3,100.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.68 : 4,680.18 = 3,100.68 : x
2. Step 2: Convert to fraction form
   3,100.68/4,680.18 = 3,100.68/x
3. Step 3: Cross multiply
   3,100.68x = 4,680.18 × 3,100.68
4. Step 4: Simplify right side
   3,100.68x = 14,511,740.52
5. Step 5: Solve for x
   x = 14,511,740.52/3,100.68
6. Step 6: Final answer
   x = 4,680.18