Finding the Fourth Proportional to 6,630.71, 9,942.88 and 3,858.00

Step by Step Solution

1. Step 1: Write the proportion equation
   6,630.71 : 9,942.88 = 3,858.00 : x
2. Step 2: Convert to fraction form
   6,630.71/9,942.88 = 3,858.00/x
3. Step 3: Cross multiply
   6,630.71x = 9,942.88 × 3,858.00
4. Step 4: Simplify right side
   6,630.71x = 38,359,664.39
5. Step 5: Solve for x
   x = 38,359,664.39/6,630.71
6. Step 6: Final answer
   x = 5,785.15