Finding the Fourth Proportional to 12,472.61, 17,215.16 and 7,170.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,472.61 : 17,215.16 = 7,170.51 : x
2. Step 2: Convert to fraction form
   12,472.61/17,215.16 = 7,170.51/x
3. Step 3: Cross multiply
   12,472.61x = 17,215.16 × 7,170.51
4. Step 4: Simplify right side
   12,472.61x = 123,441,441.08
5. Step 5: Solve for x
   x = 123,441,441.08/12,472.61
6. Step 6: Final answer
   x = 9,897.01