Finding the Fourth Proportional to 6,209.31, 8,570.67 and 3,693.21

Step by Step Solution

1. Step 1: Write the proportion equation
   6,209.31 : 8,570.67 = 3,693.21 : x
2. Step 2: Convert to fraction form
   6,209.31/8,570.67 = 3,693.21/x
3. Step 3: Cross multiply
   6,209.31x = 8,570.67 × 3,693.21
4. Step 4: Simplify right side
   6,209.31x = 31,653,284.15
5. Step 5: Solve for x
   x = 31,653,284.15/6,209.31
6. Step 6: Final answer
   x = 5,097.71