Finding the Fourth Proportional to 9,855.83, 13,596.70 and 6,667.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,855.83 : 13,596.70 = 6,667.99 : x
2. Step 2: Convert to fraction form
   9,855.83/13,596.70 = 6,667.99/x
3. Step 3: Cross multiply
   9,855.83x = 13,596.70 × 6,667.99
4. Step 4: Simplify right side
   9,855.83x = 90,662,659.63
5. Step 5: Solve for x
   x = 90,662,659.63/9,855.83
6. Step 6: Final answer
   x = 9,198.89