Finding the Fourth Proportional to 6,200.31, 8,556.50 and 3,405.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,200.31 : 8,556.50 = 3,405.81 : x
2. Step 2: Convert to fraction form
   6,200.31/8,556.50 = 3,405.81/x
3. Step 3: Cross multiply
   6,200.31x = 8,556.50 × 3,405.81
4. Step 4: Simplify right side
   6,200.31x = 29,141,813.27
5. Step 5: Solve for x
   x = 29,141,813.27/6,200.31
6. Step 6: Final answer
   x = 4,700.06