Finding the Fourth Proportional to 21,012.72, 29,039.36 and 17,230.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,012.72 : 29,039.36 = 17,230.02 : x
2. Step 2: Convert to fraction form
   21,012.72/29,039.36 = 17,230.02/x
3. Step 3: Cross multiply
   21,012.72x = 29,039.36 × 17,230.02
4. Step 4: Simplify right side
   21,012.72x = 500,348,667.44
5. Step 5: Solve for x
   x = 500,348,667.44/21,012.72
6. Step 6: Final answer
   x = 23,811.70