Finding the Fourth Proportional to 12,801, 17,665.56 and 7,212

Step by Step Solution

1. Step 1: Write the proportion equation
   12,801 : 17,665.56 = 7,212 : x
2. Step 2: Convert to fraction form
   12,801/17,665.56 = 7,212/x
3. Step 3: Cross multiply
   12,801x = 17,665.56 × 7,212
4. Step 4: Simplify right side
   12,801x = 127,404,018.72
5. Step 5: Solve for x
   x = 127,404,018.72/12,801
6. Step 6: Final answer
   x = 9,952.66