Finding the Fourth Proportional to 21,447, 29,598.48 and 13,065.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,447 : 29,598.48 = 13,065.12 : x
2. Step 2: Convert to fraction form
   21,447/29,598.48 = 13,065.12/x
3. Step 3: Cross multiply
   21,447x = 29,598.48 × 13,065.12
4. Step 4: Simplify right side
   21,447x = 386,707,693.02
5. Step 5: Solve for x
   x = 386,707,693.02/21,447
6. Step 6: Final answer
   x = 18,030.85