Finding the Fourth Proportional to 6,168.72, 8,510.42 and 3,930.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,168.72 : 8,510.42 = 3,930.18 : x
2. Step 2: Convert to fraction form
   6,168.72/8,510.42 = 3,930.18/x
3. Step 3: Cross multiply
   6,168.72x = 8,510.42 × 3,930.18
4. Step 4: Simplify right side
   6,168.72x = 33,447,482.48
5. Step 5: Solve for x
   x = 33,447,482.48/6,168.72
6. Step 6: Final answer
   x = 5,422.11