Finding the Fourth Proportional to 6,300.40, 8,700.06 and 3,946.60

Step by Step Solution

1. Step 1: Write the proportion equation
   6,300.40 : 8,700.06 = 3,946.60 : x
2. Step 2: Convert to fraction form
   6,300.40/8,700.06 = 3,946.60/x
3. Step 3: Cross multiply
   6,300.40x = 8,700.06 × 3,946.60
4. Step 4: Simplify right side
   6,300.40x = 34,335,656.80
5. Step 5: Solve for x
   x = 34,335,656.80/6,300.40
6. Step 6: Final answer
   x = 5,449.76