Finding the Fourth Proportional to 6,667.39, 9,986.70 and 3,152.09

Step by Step Solution

1. Step 1: Write the proportion equation
   6,667.39 : 9,986.70 = 3,152.09 : x
2. Step 2: Convert to fraction form
   6,667.39/9,986.70 = 3,152.09/x
3. Step 3: Cross multiply
   6,667.39x = 9,986.70 × 3,152.09
4. Step 4: Simplify right side
   6,667.39x = 31,478,977.20
5. Step 5: Solve for x
   x = 31,478,977.20/6,667.39
6. Step 6: Final answer
   x = 4,721.33