Finding the Fourth Proportional to 19,111.94, 28,630.62 and 12,518.12

Step by Step Solution

1. Step 1: Write the proportion equation
   19,111.94 : 28,630.62 = 12,518.12 : x
2. Step 2: Convert to fraction form
   19,111.94/28,630.62 = 12,518.12/x
3. Step 3: Cross multiply
   19,111.94x = 28,630.62 × 12,518.12
4. Step 4: Simplify right side
   19,111.94x = 358,401,536.83
5. Step 5: Solve for x
   x = 358,401,536.83/19,111.94
6. Step 6: Final answer
   x = 18,752.76