Finding the Fourth Proportional to 9,976.98, 14,968.17 and 8,145.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,976.98 : 14,968.17 = 8,145.30 : x
2. Step 2: Convert to fraction form
   9,976.98/14,968.17 = 8,145.30/x
3. Step 3: Cross multiply
   9,976.98x = 14,968.17 × 8,145.30
4. Step 4: Simplify right side
   9,976.98x = 121,920,235.10
5. Step 5: Solve for x
   x = 121,920,235.10/9,976.98
6. Step 6: Final answer
   x = 12,220.15