Finding the Fourth Proportional to 6,667.68, 9,992.61 and 3,159.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,667.68 : 9,992.61 = 3,159.30 : x
2. Step 2: Convert to fraction form
   6,667.68/9,992.61 = 3,159.30/x
3. Step 3: Cross multiply
   6,667.68x = 9,992.61 × 3,159.30
4. Step 4: Simplify right side
   6,667.68x = 31,569,652.77
5. Step 5: Solve for x
   x = 31,569,652.77/6,667.68
6. Step 6: Final answer
   x = 4,734.73