Finding the Fourth Proportional to 19,303.34, 28,960.41 and 12,742.34

Step by Step Solution

1. Step 1: Write the proportion equation
   19,303.34 : 28,960.41 = 12,742.34 : x
2. Step 2: Convert to fraction form
   19,303.34/28,960.41 = 12,742.34/x
3. Step 3: Cross multiply
   19,303.34x = 28,960.41 × 12,742.34
4. Step 4: Simplify right side
   19,303.34x = 369,023,390.76
5. Step 5: Solve for x
   x = 369,023,390.76/19,303.34
6. Step 6: Final answer
   x = 19,117.07