Finding the Fourth Proportional to 21,933, 32,907.72 and 13,174.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,933 : 32,907.72 = 13,174.20 : x
2. Step 2: Convert to fraction form
   21,933/32,907.72 = 13,174.20/x
3. Step 3: Cross multiply
   21,933x = 32,907.72 × 13,174.20
4. Step 4: Simplify right side
   21,933x = 433,532,884.82
5. Step 5: Solve for x
   x = 433,532,884.82/21,933
6. Step 6: Final answer
   x = 19,766.24