Finding the Fourth Proportional to 21,036.74, 29,017.82 and 13,480.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,036.74 : 29,017.82 = 13,480.52 : x
2. Step 2: Convert to fraction form
   21,036.74/29,017.82 = 13,480.52/x
3. Step 3: Cross multiply
   21,036.74x = 29,017.82 × 13,480.52
4. Step 4: Simplify right side
   21,036.74x = 391,175,302.87
5. Step 5: Solve for x
   x = 391,175,302.87/21,036.74
6. Step 6: Final answer
   x = 18,594.86