Finding the Fourth Proportional to 21,495.84, 29,665.20 and 13,535.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,495.84 : 29,665.20 = 13,535.04 : x
2. Step 2: Convert to fraction form
   21,495.84/29,665.20 = 13,535.04/x
3. Step 3: Cross multiply
   21,495.84x = 29,665.20 × 13,535.04
4. Step 4: Simplify right side
   21,495.84x = 401,519,668.61
5. Step 5: Solve for x
   x = 401,519,668.61/21,495.84
6. Step 6: Final answer
   x = 18,678.95