Finding the Fourth Proportional to 21,421, 29,562.06 and 13,038.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,421 : 29,562.06 = 13,038.04 : x
2. Step 2: Convert to fraction form
   21,421/29,562.06 = 13,038.04/x
3. Step 3: Cross multiply
   21,421x = 29,562.06 × 13,038.04
4. Step 4: Simplify right side
   21,421x = 385,431,320.76
5. Step 5: Solve for x
   x = 385,431,320.76/21,421
6. Step 6: Final answer
   x = 17,993.15