Finding the Fourth Proportional to 12,210.89, 16,848.81 and 7,175.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,210.89 : 16,848.81 = 7,175.31 : x
2. Step 2: Convert to fraction form
   12,210.89/16,848.81 = 7,175.31/x
3. Step 3: Cross multiply
   12,210.89x = 16,848.81 × 7,175.31
4. Step 4: Simplify right side
   12,210.89x = 120,895,434.88
5. Step 5: Solve for x
   x = 120,895,434.88/12,210.89
6. Step 6: Final answer
   x = 9,900.63