Finding the Fourth Proportional to 53,314.99, 79,972.59 and 13,872.04

Step by Step Solution

1. Step 1: Write the proportion equation
   53,314.99 : 79,972.59 = 13,872.04 : x
2. Step 2: Convert to fraction form
   53,314.99/79,972.59 = 13,872.04/x
3. Step 3: Cross multiply
   53,314.99x = 79,972.59 × 13,872.04
4. Step 4: Simplify right side
   53,314.99x = 1,109,382,967.38
5. Step 5: Solve for x
   x = 1,109,382,967.38/53,314.99
6. Step 6: Final answer
   x = 20,808.09