Finding the Fourth Proportional to 21,788.08, 30,066.96 and 12,357.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,788.08 : 30,066.96 = 12,357.52 : x
2. Step 2: Convert to fraction form
   21,788.08/30,066.96 = 12,357.52/x
3. Step 3: Cross multiply
   21,788.08x = 30,066.96 × 12,357.52
4. Step 4: Simplify right side
   21,788.08x = 371,553,059.54
5. Step 5: Solve for x
   x = 371,553,059.54/21,788.08
6. Step 6: Final answer
   x = 17,053.04