Finding the Fourth Proportional to 20,741.04, 28,623.18 and 12,788.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,741.04 : 28,623.18 = 12,788.52 : x
2. Step 2: Convert to fraction form
   20,741.04/28,623.18 = 12,788.52/x
3. Step 3: Cross multiply
   20,741.04x = 28,623.18 × 12,788.52
4. Step 4: Simplify right side
   20,741.04x = 366,048,109.89
5. Step 5: Solve for x
   x = 366,048,109.89/20,741.04
6. Step 6: Final answer
   x = 17,648.49