Finding the Fourth Proportional to 20,314.16, 28,034.88 and 12,356.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,314.16 : 28,034.88 = 12,356.72 : x
2. Step 2: Convert to fraction form
   20,314.16/28,034.88 = 12,356.72/x
3. Step 3: Cross multiply
   20,314.16x = 28,034.88 × 12,356.72
4. Step 4: Simplify right side
   20,314.16x = 346,419,162.39
5. Step 5: Solve for x
   x = 346,419,162.39/20,314.16
6. Step 6: Final answer
   x = 17,053.09