Finding the Fourth Proportional to 53,196.29, 79,794.47 and 13,215.23

Step by Step Solution

1. Step 1: Write the proportion equation
   53,196.29 : 79,794.47 = 13,215.23 : x
2. Step 2: Convert to fraction form
   53,196.29/79,794.47 = 13,215.23/x
3. Step 3: Cross multiply
   53,196.29x = 79,794.47 × 13,215.23
4. Step 4: Simplify right side
   53,196.29x = 1,054,501,907.84
5. Step 5: Solve for x
   x = 1,054,501,907.84/53,196.29
6. Step 6: Final answer
   x = 19,822.85