Finding the Fourth Proportional to 12,308.31, 16,986.11 and 7,003.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,308.31 : 16,986.11 = 7,003.89 : x
2. Step 2: Convert to fraction form
   12,308.31/16,986.11 = 7,003.89/x
3. Step 3: Cross multiply
   12,308.31x = 16,986.11 × 7,003.89
4. Step 4: Simplify right side
   12,308.31x = 118,968,810.95
5. Step 5: Solve for x
   x = 118,968,810.95/12,308.31
6. Step 6: Final answer
   x = 9,665.73