Finding the Fourth Proportional to 7,667.31, 11,495.64 and 3,911.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,667.31 : 11,495.64 = 3,911.80 : x
2. Step 2: Convert to fraction form
   7,667.31/11,495.64 = 3,911.80/x
3. Step 3: Cross multiply
   7,667.31x = 11,495.64 × 3,911.80
4. Step 4: Simplify right side
   7,667.31x = 44,968,644.55
5. Step 5: Solve for x
   x = 44,968,644.55/7,667.31
6. Step 6: Final answer
   x = 5,864.98