Finding the Fourth Proportional to 21,069.57, 29,069.03 and 13,903.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,069.57 : 29,069.03 = 13,903.04 : x
2. Step 2: Convert to fraction form
   21,069.57/29,069.03 = 13,903.04/x
3. Step 3: Cross multiply
   21,069.57x = 29,069.03 × 13,903.04
4. Step 4: Simplify right side
   21,069.57x = 404,147,994.28
5. Step 5: Solve for x
   x = 404,147,994.28/21,069.57
6. Step 6: Final answer
   x = 19,181.60