Finding the Fourth Proportional to 21,476.16, 29,572.56 and 16,985.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,476.16 : 29,572.56 = 16,985.52 : x
2. Step 2: Convert to fraction form
   21,476.16/29,572.56 = 16,985.52/x
3. Step 3: Cross multiply
   21,476.16x = 29,572.56 × 16,985.52
4. Step 4: Simplify right side
   21,476.16x = 502,305,309.33
5. Step 5: Solve for x
   x = 502,305,309.33/21,476.16
6. Step 6: Final answer
   x = 23,388.97